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Finding the Fourth Proportional to 67,428.90, 101,171.70 and 36,227.70

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Solution

The fourth proportional to 67,428.90, 101,171.70 and 36,227.70 is: 54,356.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,428.90 : 101,171.70 = 36,227.70 : x
  2. Step 2: Convert to fraction form
    67,428.90/101,171.70 = 36,227.70/x
  3. Step 3: Cross multiply
    67,428.90x = 101,171.70 × 36,227.70
  4. Step 4: Simplify right side
    67,428.90x = 3,665,217,996.09
  5. Step 5: Solve for x
    x = 3,665,217,996.09/67,428.90
  6. Step 6: Final answer
    x = 54,356.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.