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Finding the Fourth Proportional to 83.46, 114.84 and 81.33

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Solution

The fourth proportional to 83.46, 114.84 and 81.33 is: 111.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.46 : 114.84 = 81.33 : x
  2. Step 2: Convert to fraction form
    83.46/114.84 = 81.33/x
  3. Step 3: Cross multiply
    83.46x = 114.84 × 81.33
  4. Step 4: Simplify right side
    83.46x = 9,339.94
  5. Step 5: Solve for x
    x = 9,339.94/83.46
  6. Step 6: Final answer
    x = 111.91

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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.