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Finding the Fourth Proportional to 138,063.62, 206,964.18 and 88,003.19

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Solution

The fourth proportional to 138,063.62, 206,964.18 and 88,003.19 is: 131,921.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,063.62 : 206,964.18 = 88,003.19 : x
  2. Step 2: Convert to fraction form
    138,063.62/206,964.18 = 88,003.19/x
  3. Step 3: Cross multiply
    138,063.62x = 206,964.18 × 88,003.19
  4. Step 4: Simplify right side
    138,063.62x = 18,213,507,020.91
  5. Step 5: Solve for x
    x = 18,213,507,020.91/138,063.62
  6. Step 6: Final answer
    x = 131,921.12

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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.