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Finding the Fourth Proportional to 83.22, 113.86 and 82.88

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Solution

The fourth proportional to 83.22, 113.86 and 82.88 is: 113.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.22 : 113.86 = 82.88 : x
  2. Step 2: Convert to fraction form
    83.22/113.86 = 82.88/x
  3. Step 3: Cross multiply
    83.22x = 113.86 × 82.88
  4. Step 4: Simplify right side
    83.22x = 9,436.72
  5. Step 5: Solve for x
    x = 9,436.72/83.22
  6. Step 6: Final answer
    x = 113.39

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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.