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Finding the Fourth Proportional to 88.38, 132.62 and 81.49

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Solution

The fourth proportional to 88.38, 132.62 and 81.49 is: 122.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.38 : 132.62 = 81.49 : x
  2. Step 2: Convert to fraction form
    88.38/132.62 = 81.49/x
  3. Step 3: Cross multiply
    88.38x = 132.62 × 81.49
  4. Step 4: Simplify right side
    88.38x = 10,807.20
  5. Step 5: Solve for x
    x = 10,807.20/88.38
  6. Step 6: Final answer
    x = 122.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.