21 / 32,1,25 / 24,17 / 18,43 / 54, () sequence reasoning

21 / 32, 1, 25 / 24, 17 / 18, 43 / 54, () 21 / 32, 48 / 48, 75 / 72, 102 / 108, 129 / 162, the numerator is 21, 48, 74, 102, 129, the tolerance is 27, the latter is 156, the denominator is 32, 48, 72, 108, 162, the common ratio is 1.5, the latter is 243156 / 243 = 52 /

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