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Finding the Fourth Proportional to 83.23, 114.15 and 79.92

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Solution

The fourth proportional to 83.23, 114.15 and 79.92 is: 109.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.23 : 114.15 = 79.92 : x
  2. Step 2: Convert to fraction form
    83.23/114.15 = 79.92/x
  3. Step 3: Cross multiply
    83.23x = 114.15 × 79.92
  4. Step 4: Simplify right side
    83.23x = 9,122.87
  5. Step 5: Solve for x
    x = 9,122.87/83.23
  6. Step 6: Final answer
    x = 109.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.