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Finding the Fourth Proportional to 82.92, 114.12 and 69.15

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Solution

The fourth proportional to 82.92, 114.12 and 69.15 is: 95.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.92 : 114.12 = 69.15 : x
  2. Step 2: Convert to fraction form
    82.92/114.12 = 69.15/x
  3. Step 3: Cross multiply
    82.92x = 114.12 × 69.15
  4. Step 4: Simplify right side
    82.92x = 7,891.40
  5. Step 5: Solve for x
    x = 7,891.40/82.92
  6. Step 6: Final answer
    x = 95.17

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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.