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Finding the Fourth Proportional to 71,385.70, 98,512.17 and 39,556.66

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Solution

The fourth proportional to 71,385.70, 98,512.17 and 39,556.66 is: 54,588.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,385.70 : 98,512.17 = 39,556.66 : x
  2. Step 2: Convert to fraction form
    71,385.70/98,512.17 = 39,556.66/x
  3. Step 3: Cross multiply
    71,385.70x = 98,512.17 × 39,556.66
  4. Step 4: Simplify right side
    71,385.70x = 3,896,812,414.55
  5. Step 5: Solve for x
    x = 3,896,812,414.55/71,385.70
  6. Step 6: Final answer
    x = 54,588.14

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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.