What is the ruling on participating in a business venture where the capital is provided by one partner, and the transportation and all expenses are borne by the other, with the profit divided equally between them?

Your partnership with your friend, where the capital is cash from him and the transportation is from you, is a void partnership (a cash and asset partnership), because there is no comparable reference point for division, and the value of the asset may increase or decrease, which could lead to absorbing the profit or sharing in the price of another's property.

This partnership is valid if the value of the transportation is appraised in cash at the time of the contract and its value is known. You then become a partner with its value in the company's capital, and the profit is divided between you according to the agreement. However, if the transportation is not appraised and its value is not known at the time of the contract, then the contract is void.