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Finding the Fourth Proportional to 83.14, 114.75 and 56.92

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Solution

The fourth proportional to 83.14, 114.75 and 56.92 is: 78.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.14 : 114.75 = 56.92 : x
  2. Step 2: Convert to fraction form
    83.14/114.75 = 56.92/x
  3. Step 3: Cross multiply
    83.14x = 114.75 × 56.92
  4. Step 4: Simplify right side
    83.14x = 6,531.57
  5. Step 5: Solve for x
    x = 6,531.57/83.14
  6. Step 6: Final answer
    x = 78.56

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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.