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Finding the Fourth Proportional to 87,680.80, 131,521.20 and 40,938.40

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Solution

The fourth proportional to 87,680.80, 131,521.20 and 40,938.40 is: 61,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,680.80 : 131,521.20 = 40,938.40 : x
  2. Step 2: Convert to fraction form
    87,680.80/131,521.20 = 40,938.40/x
  3. Step 3: Cross multiply
    87,680.80x = 131,521.20 × 40,938.40
  4. Step 4: Simplify right side
    87,680.80x = 5,384,267,494.08
  5. Step 5: Solve for x
    x = 5,384,267,494.08/87,680.80
  6. Step 6: Final answer
    x = 61,407.60

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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.