Hello student, The given ratios are 5:50 12:288 9:162 7:y (let) Now we try to analyze the given ratios. 5: 5*5*2 (50 = 5.5.2) 12: 12*12*2 (288 = 12.12.2) 9: 9*9*2 (162 = 9.9.2) Hence, seeing this we can write y as y = 7*7*2 = 98. Hence, 98 is the required answer.