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Finding the Fourth Proportional to 132,503.76, 198,693.12 and 38,990.88

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Solution

The fourth proportional to 132,503.76, 198,693.12 and 38,990.88 is: 58,467.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,503.76 : 198,693.12 = 38,990.88 : x
  2. Step 2: Convert to fraction form
    132,503.76/198,693.12 = 38,990.88/x
  3. Step 3: Cross multiply
    132,503.76x = 198,693.12 × 38,990.88
  4. Step 4: Simplify right side
    132,503.76x = 7,747,219,598.75
  5. Step 5: Solve for x
    x = 7,747,219,598.75/132,503.76
  6. Step 6: Final answer
    x = 58,467.92

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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.