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Finding the Fourth Proportional to 83.31, 114.97 and 47.86

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Solution

The fourth proportional to 83.31, 114.97 and 47.86 is: 66.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.31 : 114.97 = 47.86 : x
  2. Step 2: Convert to fraction form
    83.31/114.97 = 47.86/x
  3. Step 3: Cross multiply
    83.31x = 114.97 × 47.86
  4. Step 4: Simplify right side
    83.31x = 5,502.87
  5. Step 5: Solve for x
    x = 5,502.87/83.31
  6. Step 6: Final answer
    x = 66.05

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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.