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Finding the Fourth Proportional to 80,489.92, 120,734.89 and 27,899.40

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Solution

The fourth proportional to 80,489.92, 120,734.89 and 27,899.40 is: 41,849.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,489.92 : 120,734.89 = 27,899.40 : x
  2. Step 2: Convert to fraction form
    80,489.92/120,734.89 = 27,899.40/x
  3. Step 3: Cross multiply
    80,489.92x = 120,734.89 × 27,899.40
  4. Step 4: Simplify right side
    80,489.92x = 3,368,431,373.07
  5. Step 5: Solve for x
    x = 3,368,431,373.07/80,489.92
  6. Step 6: Final answer
    x = 41,849.11

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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.