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Finding the Fourth Proportional to 83,442.69, 124,419.74 and 74,169.81

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Solution

The fourth proportional to 83,442.69, 124,419.74 and 74,169.81 is: 110,593.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,442.69 : 124,419.74 = 74,169.81 : x
  2. Step 2: Convert to fraction form
    83,442.69/124,419.74 = 74,169.81/x
  3. Step 3: Cross multiply
    83,442.69x = 124,419.74 × 74,169.81
  4. Step 4: Simplify right side
    83,442.69x = 9,228,188,105.20
  5. Step 5: Solve for x
    x = 9,228,188,105.20/83,442.69
  6. Step 6: Final answer
    x = 110,593.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.