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Finding the Fourth Proportional to 132,408.40, 198,612.60 and 85,169.20

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Solution

The fourth proportional to 132,408.40, 198,612.60 and 85,169.20 is: 127,753.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,408.40 : 198,612.60 = 85,169.20 : x
  2. Step 2: Convert to fraction form
    132,408.40/198,612.60 = 85,169.20/x
  3. Step 3: Cross multiply
    132,408.40x = 198,612.60 × 85,169.20
  4. Step 4: Simplify right side
    132,408.40x = 16,915,676,251.92
  5. Step 5: Solve for x
    x = 16,915,676,251.92/132,408.40
  6. Step 6: Final answer
    x = 127,753.80

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1.5x scale

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.