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Finding the Fourth Proportional to 84.81, 116.07 and 82.47

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Solution

The fourth proportional to 84.81, 116.07 and 82.47 is: 112.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.81 : 116.07 = 82.47 : x
  2. Step 2: Convert to fraction form
    84.81/116.07 = 82.47/x
  3. Step 3: Cross multiply
    84.81x = 116.07 × 82.47
  4. Step 4: Simplify right side
    84.81x = 9,572.29
  5. Step 5: Solve for x
    x = 9,572.29/84.81
  6. Step 6: Final answer
    x = 112.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.