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Finding the Fourth Proportional to 120,930.28, 181,489.88 and 83,750.92

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Solution

The fourth proportional to 120,930.28, 181,489.88 and 83,750.92 is: 125,691.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,930.28 : 181,489.88 = 83,750.92 : x
  2. Step 2: Convert to fraction form
    120,930.28/181,489.88 = 83,750.92/x
  3. Step 3: Cross multiply
    120,930.28x = 181,489.88 × 83,750.92
  4. Step 4: Simplify right side
    120,930.28x = 15,199,944,420.69
  5. Step 5: Solve for x
    x = 15,199,944,420.69/120,930.28
  6. Step 6: Final answer
    x = 125,691.80

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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.