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Finding the Fourth Proportional to 67,666.30, 101,489.85 and 20,923.90

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Solution

The fourth proportional to 67,666.30, 101,489.85 and 20,923.90 is: 31,382.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,666.30 : 101,489.85 = 20,923.90 : x
  2. Step 2: Convert to fraction form
    67,666.30/101,489.85 = 20,923.90/x
  3. Step 3: Cross multiply
    67,666.30x = 101,489.85 × 20,923.90
  4. Step 4: Simplify right side
    67,666.30x = 2,123,563,472.42
  5. Step 5: Solve for x
    x = 2,123,563,472.42/67,666.30
  6. Step 6: Final answer
    x = 31,382.88

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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.