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Finding the Fourth Proportional to 132,512.80, 198,922.80 and 79,981.60

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Solution

The fourth proportional to 132,512.80, 198,922.80 and 79,981.60 is: 120,065.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,512.80 : 198,922.80 = 79,981.60 : x
  2. Step 2: Convert to fraction form
    132,512.80/198,922.80 = 79,981.60/x
  3. Step 3: Cross multiply
    132,512.80x = 198,922.80 × 79,981.60
  4. Step 4: Simplify right side
    132,512.80x = 15,910,163,820.48
  5. Step 5: Solve for x
    x = 15,910,163,820.48/132,512.80
  6. Step 6: Final answer
    x = 120,065.11

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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.