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Finding the Fourth Proportional to 83,879.40, 125,600.40 and 54,136.20

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Solution

The fourth proportional to 83,879.40, 125,600.40 and 54,136.20 is: 81,063.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,879.40 : 125,600.40 = 54,136.20 : x
  2. Step 2: Convert to fraction form
    83,879.40/125,600.40 = 54,136.20/x
  3. Step 3: Cross multiply
    83,879.40x = 125,600.40 × 54,136.20
  4. Step 4: Simplify right side
    83,879.40x = 6,799,528,374.48
  5. Step 5: Solve for x
    x = 6,799,528,374.48/83,879.40
  6. Step 6: Final answer
    x = 81,063.15

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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.