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Finding the Fourth Proportional to 138,063.64, 206,964.20 and 88,003.20

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Solution

The fourth proportional to 138,063.64, 206,964.20 and 88,003.20 is: 131,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,063.64 : 206,964.20 = 88,003.20 : x
  2. Step 2: Convert to fraction form
    138,063.64/206,964.20 = 88,003.20/x
  3. Step 3: Cross multiply
    138,063.64x = 206,964.20 × 88,003.20
  4. Step 4: Simplify right side
    138,063.64x = 18,213,511,885.44
  5. Step 5: Solve for x
    x = 18,213,511,885.44/138,063.64
  6. Step 6: Final answer
    x = 131,921.13

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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.