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Finding the Fourth Proportional to 83.14, 114.78 and 55.55

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Solution

The fourth proportional to 83.14, 114.78 and 55.55 is: 76.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.14 : 114.78 = 55.55 : x
  2. Step 2: Convert to fraction form
    83.14/114.78 = 55.55/x
  3. Step 3: Cross multiply
    83.14x = 114.78 × 55.55
  4. Step 4: Simplify right side
    83.14x = 6,375.74
  5. Step 5: Solve for x
    x = 6,375.74/83.14
  6. Step 6: Final answer
    x = 76.69

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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.