GIVEN: Sum of three numbers is 160 and these numbers are in the ratio of 1 : 3 : 4. CONCEPT: Basic ratio concept. CALCULATION: Suppose the numbers are x, 3x and 4x respectively. So,x + 3x + 4x = 160 8x = 160 x = 20 Now, Product = x × 3x × 4x = 20 × 60 × 80 = 96000