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Finding the Fourth Proportional to 71,471.52, 98,635.44 and 39,641.76

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Solution

The fourth proportional to 71,471.52, 98,635.44 and 39,641.76 is: 54,708.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,471.52 : 98,635.44 = 39,641.76 : x
  2. Step 2: Convert to fraction form
    71,471.52/98,635.44 = 39,641.76/x
  3. Step 3: Cross multiply
    71,471.52x = 98,635.44 × 39,641.76
  4. Step 4: Simplify right side
    71,471.52x = 3,910,082,439.97
  5. Step 5: Solve for x
    x = 3,910,082,439.97/71,471.52
  6. Step 6: Final answer
    x = 54,708.26

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1.5x scale

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.