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Finding the Fourth Proportional to 83,691.60, 125,428.05 and 33,730.80

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Solution

The fourth proportional to 83,691.60, 125,428.05 and 33,730.80 is: 50,552.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,691.60 : 125,428.05 = 33,730.80 : x
  2. Step 2: Convert to fraction form
    83,691.60/125,428.05 = 33,730.80/x
  3. Step 3: Cross multiply
    83,691.60x = 125,428.05 × 33,730.80
  4. Step 4: Simplify right side
    83,691.60x = 4,230,788,468.94
  5. Step 5: Solve for x
    x = 4,230,788,468.94/83,691.60
  6. Step 6: Final answer
    x = 50,552.13

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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.