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Finding the Fourth Proportional to 82.92, 113.72 and 80.26

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Solution

The fourth proportional to 82.92, 113.72 and 80.26 is: 110.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.92 : 113.72 = 80.26 : x
  2. Step 2: Convert to fraction form
    82.92/113.72 = 80.26/x
  3. Step 3: Cross multiply
    82.92x = 113.72 × 80.26
  4. Step 4: Simplify right side
    82.92x = 9,127.17
  5. Step 5: Solve for x
    x = 9,127.17/82.92
  6. Step 6: Final answer
    x = 110.07

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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.