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Finding the Fourth Proportional to 100,687.35, 138,913.97 and 62,433.14

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Solution

The fourth proportional to 100,687.35, 138,913.97 and 62,433.14 is: 86,136.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,687.35 : 138,913.97 = 62,433.14 : x
  2. Step 2: Convert to fraction form
    100,687.35/138,913.97 = 62,433.14/x
  3. Step 3: Cross multiply
    100,687.35x = 138,913.97 × 62,433.14
  4. Step 4: Simplify right side
    100,687.35x = 8,672,834,330.23
  5. Step 5: Solve for x
    x = 8,672,834,330.23/100,687.35
  6. Step 6: Final answer
    x = 86,136.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.