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Finding the Fourth Proportional to 221,129.40, 331,691.04 and 132,407.40

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Solution

The fourth proportional to 221,129.40, 331,691.04 and 132,407.40 is: 198,609.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,129.40 : 331,691.04 = 132,407.40 : x
  2. Step 2: Convert to fraction form
    221,129.40/331,691.04 = 132,407.40/x
  3. Step 3: Cross multiply
    221,129.40x = 331,691.04 × 132,407.40
  4. Step 4: Simplify right side
    221,129.40x = 43,918,348,209.70
  5. Step 5: Solve for x
    x = 43,918,348,209.70/221,129.40
  6. Step 6: Final answer
    x = 198,609.27

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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.