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Finding the Fourth Proportional to 220,819.80, 331,229.70 and 127,248.60

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Solution

The fourth proportional to 220,819.80, 331,229.70 and 127,248.60 is: 190,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,819.80 : 331,229.70 = 127,248.60 : x
  2. Step 2: Convert to fraction form
    220,819.80/331,229.70 = 127,248.60/x
  3. Step 3: Cross multiply
    220,819.80x = 331,229.70 × 127,248.60
  4. Step 4: Simplify right side
    220,819.80x = 42,148,515,603.42
  5. Step 5: Solve for x
    x = 42,148,515,603.42/220,819.80
  6. Step 6: Final answer
    x = 190,872.90

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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.