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Finding the Fourth Proportional to 83.43, 115.13 and 50.68

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Solution

The fourth proportional to 83.43, 115.13 and 50.68 is: 69.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.43 : 115.13 = 50.68 : x
  2. Step 2: Convert to fraction form
    83.43/115.13 = 50.68/x
  3. Step 3: Cross multiply
    83.43x = 115.13 × 50.68
  4. Step 4: Simplify right side
    83.43x = 5,834.79
  5. Step 5: Solve for x
    x = 5,834.79/83.43
  6. Step 6: Final answer
    x = 69.94

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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.