A farmer grows two types of crops: wheat and barley. He has a total of 60 acres of land. The yield of wheat is directly proportional to the land area allocated for it, and similarly for barley. If the farmer grows wheat on 24 acres and gets 72 tons of wheat, how many tons of barley can he expect if he allocates the remaining land to barley, given that the yield rate for barley is 1.5 times that of wheat? Let's think step by step and output the final answer within \boxed{}.
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