1) under the law of partnership, a firm has no legal existence apart from its partners, and it is merely a compendious name to describe its partners.

2) Under Section 19 of the Partnership Act, the implied authority of a partner does not empower him to acquire immovable property for the firm or transfer immovable property belonging to the firm. In the absence of any agreement between the partners, if any occasion arises for dealing with the immovable property of the firm, then it would be necessary for all the partners to join the instrument.

3) you need his consent to sell immovable property 

Yes, the majority partners can proceed to dissolve the firm and sell the property so as to divide the sale proceeds among the partners.

the 4 partners cannot transfer the property of the firm if the consent of all partners is not in place

section 19(2)(g) of the Indian Partnership Act, 1932 prohibits such transfer, provided there is no custom of trade or usage to the contrary

further no buyer would be willing to purchase the firm's property is all the partners are not consenting for such sale

if as per the partnership contract between the partners the partnership is a partnership at will then the 4 partners can issue a notice for dissolving the firm to the 5th partner u/s 43 of the partnership act, 1932 and the firm will stand dissolved upon expiry of notice period stated in the dissolution notice

Dear sir,

The partnership deed itself consists of the mode in which any dispute that arises between the partners shall be solved in a certain manner. This could either be by arbitration or in the court of law.

Now, as far as your query regarding the exit of other partners is concerned, please note that any partner can leave a firm after sending a legal notice to other partners, and unless laid down in the partnership agreement otherwise, no one can object such exit.

However. in your case the dissolution seems to happen by way of agreement amongst only four members. Please note that for the dissolution of firm, all members must give their consent. Without the other person's consent, the court can rightly rule in favour of him to stop the sale proceeds. Also, for the appropriation of funds, the consent of all the partners is required. 

Hence, it is advised that you seek to dissolve the partnership firm by way of court order. For this you will have to file a petition and if your firm satisfies any of the following conditions, the court can grant decree in your favour:

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  When a partner becomes insane 
  
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  When a partner becomes permanently incapable of performing his duties as a partner. 
  
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  When a partner is guilty of misconduct which is more likely to affects the reputation and business of the firm. 
  
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  When a partner continuously commits a breach of the partnership agreement. 
  
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  When a partner transfers the whole of his interest or share in the firm to a third party. 
  
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  When the business of the firm cannot be carried on except at a loss. 
  
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  When the court’s opinion regarding the dissolution of the firm to be just and equitable on any ground. Thank you 
  
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The dissolution of a partnership firm is said to be dissolved when the relationship between the partners is terminated

- A partnership firm can be dissolved, if all the partners have mutually agreed upon closing the partnership firm, or after entering into an agreement.

- Further, if a partnership business is at will, then any partner can dissolve the partnership by giving an advanced notice. Notice should contain a date from which dissolution will be effective.

- Further, if any of the partners becomes mentally unstable or misbehaves with the other partner or doesn’t abide by the clauses of the agreement, then the other partner may file a case in the court to dissolve the firm. However a court can dissolve the firm only if it is registered with the registrar of firms. Hence an unregistered partnership firm can’t be dissolved by the court.

- Further, a partnership can be dissolved when a partner withdraws or dies.

- Further, in case of dissolution, accounts have to be settled and distributed as per the mode prescribed in section 48 of the Partnership Act.

- Hence, 4 partners can wind up the business and sell the land , then the partnership will come to an end , as for partnership it require at least two partner to continue. 

In Partnership where more than 2 persons are Partners what the majority will decide that will be applicable.

In your matter where there are 5 persons in a Partnership 4 giving consent is the majority then 1 person not giving consent will not be applicable.

You can show the decision taken by the majority in the Partners & sell the property with no issues.

Thank you.