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Finding the Fourth Proportional to 86,286.60, 129,429.81 and 27,127.44

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Solution

The fourth proportional to 86,286.60, 129,429.81 and 27,127.44 is: 40,691.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,286.60 : 129,429.81 = 27,127.44 : x
  2. Step 2: Convert to fraction form
    86,286.60/129,429.81 = 27,127.44/x
  3. Step 3: Cross multiply
    86,286.60x = 129,429.81 × 27,127.44
  4. Step 4: Simplify right side
    86,286.60x = 3,511,099,404.99
  5. Step 5: Solve for x
    x = 3,511,099,404.99/86,286.60
  6. Step 6: Final answer
    x = 40,691.13

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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.