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Finding the Fourth Proportional to 132,213.60, 198,028.80 and 79,531.20

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Solution

The fourth proportional to 132,213.60, 198,028.80 and 79,531.20 is: 119,121.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,213.60 : 198,028.80 = 79,531.20 : x
  2. Step 2: Convert to fraction form
    132,213.60/198,028.80 = 79,531.20/x
  3. Step 3: Cross multiply
    132,213.60x = 198,028.80 × 79,531.20
  4. Step 4: Simplify right side
    132,213.60x = 15,749,468,098.56
  5. Step 5: Solve for x
    x = 15,749,468,098.56/132,213.60
  6. Step 6: Final answer
    x = 119,121.39

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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.