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Finding the Fourth Proportional to 82.82, 114.29 and 47.86

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Solution

The fourth proportional to 82.82, 114.29 and 47.86 is: 66.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.82 : 114.29 = 47.86 : x
  2. Step 2: Convert to fraction form
    82.82/114.29 = 47.86/x
  3. Step 3: Cross multiply
    82.82x = 114.29 × 47.86
  4. Step 4: Simplify right side
    82.82x = 5,469.92
  5. Step 5: Solve for x
    x = 5,469.92/82.82
  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.