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Finding the Fourth Proportional to 138,611.20, 207,885.42 and 63,659.29

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Solution

The fourth proportional to 138,611.20, 207,885.42 and 63,659.29 is: 95,474.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,611.20 : 207,885.42 = 63,659.29 : x
  2. Step 2: Convert to fraction form
    138,611.20/207,885.42 = 63,659.29/x
  3. Step 3: Cross multiply
    138,611.20x = 207,885.42 × 63,659.29
  4. Step 4: Simplify right side
    138,611.20x = 13,233,837,278.70
  5. Step 5: Solve for x
    x = 13,233,837,278.70/138,611.20
  6. Step 6: Final answer
    x = 95,474.52

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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.