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Finding the Fourth Proportional to 132,387.60, 198,581.40 and 115,280.40

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Solution

The fourth proportional to 132,387.60, 198,581.40 and 115,280.40 is: 172,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,387.60 : 198,581.40 = 115,280.40 : x
  2. Step 2: Convert to fraction form
    132,387.60/198,581.40 = 115,280.40/x
  3. Step 3: Cross multiply
    132,387.60x = 198,581.40 × 115,280.40
  4. Step 4: Simplify right side
    132,387.60x = 22,892,543,224.56
  5. Step 5: Solve for x
    x = 22,892,543,224.56/132,387.60
  6. Step 6: Final answer
    x = 172,920.60

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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.