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Finding the Fourth Proportional to 138,381.62, 207,603.95 and 43,611.30

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Solution

The fourth proportional to 138,381.62, 207,603.95 and 43,611.30 is: 65,426.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,381.62 : 207,603.95 = 43,611.30 : x
  2. Step 2: Convert to fraction form
    138,381.62/207,603.95 = 43,611.30/x
  3. Step 3: Cross multiply
    138,381.62x = 207,603.95 × 43,611.30
  4. Step 4: Simplify right side
    138,381.62x = 9,053,877,926.58
  5. Step 5: Solve for x
    x = 9,053,877,926.58/138,381.62
  6. Step 6: Final answer
    x = 65,426.88

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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.