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Finding the Fourth Proportional to 83,355.62, 115,084.42 and 74,387.72

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Solution

The fourth proportional to 83,355.62, 115,084.42 and 74,387.72 is: 102,702.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,355.62 : 115,084.42 = 74,387.72 : x
  2. Step 2: Convert to fraction form
    83,355.62/115,084.42 = 74,387.72/x
  3. Step 3: Cross multiply
    83,355.62x = 115,084.42 × 74,387.72
  4. Step 4: Simplify right side
    83,355.62x = 8,560,867,611.32
  5. Step 5: Solve for x
    x = 8,560,867,611.32/83,355.62
  6. Step 6: Final answer
    x = 102,702.94

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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.