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Finding the Fourth Proportional to 83,353.62, 115,081.65 and 74,385.72

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Solution

The fourth proportional to 83,353.62, 115,081.65 and 74,385.72 is: 102,700.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,353.62 : 115,081.65 = 74,385.72 : x
  2. Step 2: Convert to fraction form
    83,353.62/115,081.65 = 74,385.72/x
  3. Step 3: Cross multiply
    83,353.62x = 115,081.65 × 74,385.72
  4. Step 4: Simplify right side
    83,353.62x = 8,560,431,394.04
  5. Step 5: Solve for x
    x = 8,560,431,394.04/83,353.62
  6. Step 6: Final answer
    x = 102,700.18

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1.5x scale

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.