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Finding the Fourth Proportional to 123,727.70, 170,748.02 and 72,731.08

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Solution

The fourth proportional to 123,727.70, 170,748.02 and 72,731.08 is: 100,371.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,727.70 : 170,748.02 = 72,731.08 : x
  2. Step 2: Convert to fraction form
    123,727.70/170,748.02 = 72,731.08/x
  3. Step 3: Cross multiply
    123,727.70x = 170,748.02 × 72,731.08
  4. Step 4: Simplify right side
    123,727.70x = 12,418,687,902.46
  5. Step 5: Solve for x
    x = 12,418,687,902.46/123,727.70
  6. Step 6: Final answer
    x = 100,371.12

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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.