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Finding the Fourth Proportional to 71,432.76, 98,469.90 and 47,508.60

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Solution

The fourth proportional to 71,432.76, 98,469.90 and 47,508.60 is: 65,490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,432.76 : 98,469.90 = 47,508.60 : x
  2. Step 2: Convert to fraction form
    71,432.76/98,469.90 = 47,508.60/x
  3. Step 3: Cross multiply
    71,432.76x = 98,469.90 × 47,508.60
  4. Step 4: Simplify right side
    71,432.76x = 4,678,167,091.14
  5. Step 5: Solve for x
    x = 4,678,167,091.14/71,432.76
  6. Step 6: Final answer
    x = 65,490.50

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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.