Home / 100,691.60-138,919.82-62,437.36

Finding the Fourth Proportional to 100,691.60, 138,919.82 and 62,437.36

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Solution

The fourth proportional to 100,691.60, 138,919.82 and 62,437.36 is: 86,142.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,691.60 : 138,919.82 = 62,437.36 : x
  2. Step 2: Convert to fraction form
    100,691.60/138,919.82 = 62,437.36/x
  3. Step 3: Cross multiply
    100,691.60x = 138,919.82 × 62,437.36
  4. Step 4: Simplify right side
    100,691.60x = 8,673,786,812.48
  5. Step 5: Solve for x
    x = 8,673,786,812.48/100,691.60
  6. Step 6: Final answer
    x = 86,142.11

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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.