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Finding the Fourth Proportional to 71,471.92, 98,630.60 and 39,640.88

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Solution

The fourth proportional to 71,471.92, 98,630.60 and 39,640.88 is: 54,704.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,471.92 : 98,630.60 = 39,640.88 : x
  2. Step 2: Convert to fraction form
    71,471.92/98,630.60 = 39,640.88/x
  3. Step 3: Cross multiply
    71,471.92x = 98,630.60 × 39,640.88
  4. Step 4: Simplify right side
    71,471.92x = 3,909,803,778.93
  5. Step 5: Solve for x
    x = 3,909,803,778.93/71,471.92
  6. Step 6: Final answer
    x = 54,704.05

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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.