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Finding the Fourth Proportional to 225,680.80, 338,521.20 and 132,138.40

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Solution

The fourth proportional to 225,680.80, 338,521.20 and 132,138.40 is: 198,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,680.80 : 338,521.20 = 132,138.40 : x
  2. Step 2: Convert to fraction form
    225,680.80/338,521.20 = 132,138.40/x
  3. Step 3: Cross multiply
    225,680.80x = 338,521.20 × 132,138.40
  4. Step 4: Simplify right side
    225,680.80x = 44,731,649,734.08
  5. Step 5: Solve for x
    x = 44,731,649,734.08/225,680.80
  6. Step 6: Final answer
    x = 198,207.60

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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.