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Finding the Fourth Proportional to 80,490.92, 120,736.39 and 27,900.40

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Solution

The fourth proportional to 80,490.92, 120,736.39 and 27,900.40 is: 41,850.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,490.92 : 120,736.39 = 27,900.40 : x
  2. Step 2: Convert to fraction form
    80,490.92/120,736.39 = 27,900.40/x
  3. Step 3: Cross multiply
    80,490.92x = 120,736.39 × 27,900.40
  4. Step 4: Simplify right side
    80,490.92x = 3,368,593,575.56
  5. Step 5: Solve for x
    x = 3,368,593,575.56/80,490.92
  6. Step 6: Final answer
    x = 41,850.60

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Similar ratio
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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.