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Finding the Fourth Proportional to 71,257.92, 98,327.04 and 39,422.40

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Solution

The fourth proportional to 71,257.92, 98,327.04 and 39,422.40 is: 54,397.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,257.92 : 98,327.04 = 39,422.40 : x
  2. Step 2: Convert to fraction form
    71,257.92/98,327.04 = 39,422.40/x
  3. Step 3: Cross multiply
    71,257.92x = 98,327.04 × 39,422.40
  4. Step 4: Simplify right side
    71,257.92x = 3,876,287,901.70
  5. Step 5: Solve for x
    x = 3,876,287,901.70/71,257.92
  6. Step 6: Final answer
    x = 54,397.99

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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.