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Finding the Fourth Proportional to 71,472.28, 107,121.87 and 39,848.76

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Solution

The fourth proportional to 71,472.28, 107,121.87 and 39,848.76 is: 59,724.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,472.28 : 107,121.87 = 39,848.76 : x
  2. Step 2: Convert to fraction form
    71,472.28/107,121.87 = 39,848.76/x
  3. Step 3: Cross multiply
    71,472.28x = 107,121.87 × 39,848.76
  4. Step 4: Simplify right side
    71,472.28x = 4,268,673,688.38
  5. Step 5: Solve for x
    x = 4,268,673,688.38/71,472.28
  6. Step 6: Final answer
    x = 59,724.88

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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.