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Finding the Fourth Proportional to 87,648.40, 131,472.60 and 84,149.20

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Solution

The fourth proportional to 87,648.40, 131,472.60 and 84,149.20 is: 126,223.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,648.40 : 131,472.60 = 84,149.20 : x
  2. Step 2: Convert to fraction form
    87,648.40/131,472.60 = 84,149.20/x
  3. Step 3: Cross multiply
    87,648.40x = 131,472.60 × 84,149.20
  4. Step 4: Simplify right side
    87,648.40x = 11,063,314,111.92
  5. Step 5: Solve for x
    x = 11,063,314,111.92/87,648.40
  6. Step 6: Final answer
    x = 126,223.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.