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Finding the Fourth Proportional to 138,625.55, 207,793.61 and 100,582.91

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Solution

The fourth proportional to 138,625.55, 207,793.61 and 100,582.91 is: 150,769.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,625.55 : 207,793.61 = 100,582.91 : x
  2. Step 2: Convert to fraction form
    138,625.55/207,793.61 = 100,582.91/x
  3. Step 3: Cross multiply
    138,625.55x = 207,793.61 × 100,582.91
  4. Step 4: Simplify right side
    138,625.55x = 20,900,485,470.29
  5. Step 5: Solve for x
    x = 20,900,485,470.29/138,625.55
  6. Step 6: Final answer
    x = 150,769.36

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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.