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Finding the Fourth Proportional to 220,489.95, 330,781.92 and 125,765.31

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Solution

The fourth proportional to 220,489.95, 330,781.92 and 125,765.31 is: 188,674.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,489.95 : 330,781.92 = 125,765.31 : x
  2. Step 2: Convert to fraction form
    220,489.95/330,781.92 = 125,765.31/x
  3. Step 3: Cross multiply
    220,489.95x = 330,781.92 × 125,765.31
  4. Step 4: Simplify right side
    220,489.95x = 41,600,890,711.20
  5. Step 5: Solve for x
    x = 41,600,890,711.20/220,489.95
  6. Step 6: Final answer
    x = 188,674.77

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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.