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Finding the Fourth Proportional to 80,218.80, 120,275.08 and 42,755.12

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Solution

The fourth proportional to 80,218.80, 120,275.08 and 42,755.12 is: 64,104.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,218.80 : 120,275.08 = 42,755.12 : x
  2. Step 2: Convert to fraction form
    80,218.80/120,275.08 = 42,755.12/x
  3. Step 3: Cross multiply
    80,218.80x = 120,275.08 × 42,755.12
  4. Step 4: Simplify right side
    80,218.80x = 5,142,375,478.41
  5. Step 5: Solve for x
    x = 5,142,375,478.41/80,218.80
  6. Step 6: Final answer
    x = 64,104.37

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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.