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Finding the Fourth Proportional to 88.38, 131.91 and 82.04

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Solution

The fourth proportional to 88.38, 131.91 and 82.04 is: 122.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.38 : 131.91 = 82.04 : x
  2. Step 2: Convert to fraction form
    88.38/131.91 = 82.04/x
  3. Step 3: Cross multiply
    88.38x = 131.91 × 82.04
  4. Step 4: Simplify right side
    88.38x = 10,821.24
  5. Step 5: Solve for x
    x = 10,821.24/88.38
  6. Step 6: Final answer
    x = 122.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.