Clear of fractions and solve the system. Edwin
First part of the condition says x + y + z = 243, (1) where x is the first quantity, y is the second and z is the third. Second part of the condition gives these equalities= , (2) = (3) From (2), y = , z = = = 2x. Substitute it into (3), and you will get = 243, or 4.5x = 243. x = = 54. Then y = = 81 and z = 2x = 108.