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Finding the Fourth Proportional to 125,793.77, 188,778.13 and 81,310.19

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Solution

The fourth proportional to 125,793.77, 188,778.13 and 81,310.19 is: 122,021.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,793.77 : 188,778.13 = 81,310.19 : x
  2. Step 2: Convert to fraction form
    125,793.77/188,778.13 = 81,310.19/x
  3. Step 3: Cross multiply
    125,793.77x = 188,778.13 × 81,310.19
  4. Step 4: Simplify right side
    125,793.77x = 15,349,585,349.47
  5. Step 5: Solve for x
    x = 15,349,585,349.47/125,793.77
  6. Step 6: Final answer
    x = 122,021.83

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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.