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Finding the Fourth Proportional to 82.47, 114.02 and 61.85

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Solution

The fourth proportional to 82.47, 114.02 and 61.85 is: 85.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.47 : 114.02 = 61.85 : x
  2. Step 2: Convert to fraction form
    82.47/114.02 = 61.85/x
  3. Step 3: Cross multiply
    82.47x = 114.02 × 61.85
  4. Step 4: Simplify right side
    82.47x = 7,052.27
  5. Step 5: Solve for x
    x = 7,052.27/82.47
  6. Step 6: Final answer
    x = 85.52

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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.