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Finding the Fourth Proportional to 71,472.70, 107,174.40 and 21,543.49

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Solution

The fourth proportional to 71,472.70, 107,174.40 and 21,543.49 is: 32,304.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,472.70 : 107,174.40 = 21,543.49 : x
  2. Step 2: Convert to fraction form
    71,472.70/107,174.40 = 21,543.49/x
  3. Step 3: Cross multiply
    71,472.70x = 107,174.40 × 21,543.49
  4. Step 4: Simplify right side
    71,472.70x = 2,308,910,614.66
  5. Step 5: Solve for x
    x = 2,308,910,614.66/71,472.70
  6. Step 6: Final answer
    x = 32,304.79

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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.