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Finding the Fourth Proportional to 90,279.72, 135,419.42 and 27,099.78

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Solution

The fourth proportional to 90,279.72, 135,419.42 and 27,099.78 is: 40,649.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,279.72 : 135,419.42 = 27,099.78 : x
  2. Step 2: Convert to fraction form
    90,279.72/135,419.42 = 27,099.78/x
  3. Step 3: Cross multiply
    90,279.72x = 135,419.42 × 27,099.78
  4. Step 4: Simplify right side
    90,279.72x = 3,669,836,354.23
  5. Step 5: Solve for x
    x = 3,669,836,354.23/90,279.72
  6. Step 6: Final answer
    x = 40,649.62

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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.