Question

12 : 72 : : 13 : ? (a) 31 (b) 34 (c) 100 (d) 78. answer

Answer 1

12 : 72 : : 13 : ?

Product of extremes = Product of means

12x = 72*13

12x = 936

x = 936/12

x = 78

Therefore the answer is (d)78

Hope it helps :)

Answer 2

$\frac{12}{72} \div \frac{13}{x} \\ \ \frac{12}{72} \times \frac{x}{13} \\ \frac{12x}{936} \\ x = \frac{12}{936} \\ x = 78 \\ \\ \\ \\ \\ please \: mark \: brainliest$