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In a proportion, the 1st , 2nd and 4th terms are 51 , 68 and 108, respectively. What is the 3rd term ? |
84 83 82 81 |
81 |
In the given proportion, a : b :: c : d d = \(\frac{b\; \times\; c}{a}\) 108 = \(\frac{68\; \times\; c}{51}\) c = \(\frac{108\; \times\; 51}{68}\) c = 81 |
