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Finding the Fourth Proportional to 90,912.78, 136,425.96 and 34,757.64

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Solution

The fourth proportional to 90,912.78, 136,425.96 and 34,757.64 is: 52,158.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,912.78 : 136,425.96 = 34,757.64 : x
  2. Step 2: Convert to fraction form
    90,912.78/136,425.96 = 34,757.64/x
  3. Step 3: Cross multiply
    90,912.78x = 136,425.96 × 34,757.64
  4. Step 4: Simplify right side
    90,912.78x = 4,741,844,404.33
  5. Step 5: Solve for x
    x = 4,741,844,404.33/90,912.78
  6. Step 6: Final answer
    x = 52,158.17

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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.