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Finding the Fourth Proportional to 138,062.64, 206,962.70 and 88,002.20

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Solution

The fourth proportional to 138,062.64, 206,962.70 and 88,002.20 is: 131,919.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,062.64 : 206,962.70 = 88,002.20 : x
  2. Step 2: Convert to fraction form
    138,062.64/206,962.70 = 88,002.20/x
  3. Step 3: Cross multiply
    138,062.64x = 206,962.70 × 88,002.20
  4. Step 4: Simplify right side
    138,062.64x = 18,213,172,917.94
  5. Step 5: Solve for x
    x = 18,213,172,917.94/138,062.64
  6. Step 6: Final answer
    x = 131,919.63

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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.