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Finding the Fourth Proportional to 138,611.79, 207,886.31 and 63,659.88

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Solution

The fourth proportional to 138,611.79, 207,886.31 and 63,659.88 is: 95,475.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,611.79 : 207,886.31 = 63,659.88 : x
  2. Step 2: Convert to fraction form
    138,611.79/207,886.31 = 63,659.88/x
  3. Step 3: Cross multiply
    138,611.79x = 207,886.31 × 63,659.88
  4. Step 4: Simplify right side
    138,611.79x = 13,234,017,548.24
  5. Step 5: Solve for x
    x = 13,234,017,548.24/138,611.79
  6. Step 6: Final answer
    x = 95,475.41

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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.