Home / 83,781.18-115,579.48-74,230.81

Finding the Fourth Proportional to 83,781.18, 115,579.48 and 74,230.81

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Solution

The fourth proportional to 83,781.18, 115,579.48 and 74,230.81 is: 102,404.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,781.18 : 115,579.48 = 74,230.81 : x
  2. Step 2: Convert to fraction form
    83,781.18/115,579.48 = 74,230.81/x
  3. Step 3: Cross multiply
    83,781.18x = 115,579.48 × 74,230.81
  4. Step 4: Simplify right side
    83,781.18x = 8,579,558,419.78
  5. Step 5: Solve for x
    x = 8,579,558,419.78/83,781.18
  6. Step 6: Final answer
    x = 102,404.36

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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.