LET investment of A = N,Investment of B = 2N,Investment of C = 3N, A's share : B's share : C's share = (N X 12) : (2N x 6) : (3N x 4)= 12N : 12N : 12N = 1 : 1 : 1 C's share = [1/(1 + 1 + 1)] x 54000= (1/3) x 54000 = 18000