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Finding the Fourth Proportional to 80,642.39, 120,981.72 and 27,331.34

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Solution

The fourth proportional to 80,642.39, 120,981.72 and 27,331.34 is: 41,003.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642.39 : 120,981.72 = 27,331.34 : x
  2. Step 2: Convert to fraction form
    80,642.39/120,981.72 = 27,331.34/x
  3. Step 3: Cross multiply
    80,642.39x = 120,981.72 × 27,331.34
  4. Step 4: Simplify right side
    80,642.39x = 3,306,592,523.10
  5. Step 5: Solve for x
    x = 3,306,592,523.10/80,642.39
  6. Step 6: Final answer
    x = 41,003.16

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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.