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Finding the Fourth Proportional to 123,546.56, 170,489.67 and 66,956.72

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Solution

The fourth proportional to 123,546.56, 170,489.67 and 66,956.72 is: 92,397.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,546.56 : 170,489.67 = 66,956.72 : x
  2. Step 2: Convert to fraction form
    123,546.56/170,489.67 = 66,956.72/x
  3. Step 3: Cross multiply
    123,546.56x = 170,489.67 × 66,956.72
  4. Step 4: Simplify right side
    123,546.56x = 11,415,429,097.08
  5. Step 5: Solve for x
    x = 11,415,429,097.08/123,546.56
  6. Step 6: Final answer
    x = 92,397.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.