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Finding the Fourth Proportional to 88.97, 132.67 and 76.21

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Solution

The fourth proportional to 88.97, 132.67 and 76.21 is: 113.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.97 : 132.67 = 76.21 : x
  2. Step 2: Convert to fraction form
    88.97/132.67 = 76.21/x
  3. Step 3: Cross multiply
    88.97x = 132.67 × 76.21
  4. Step 4: Simplify right side
    88.97x = 10,110.12
  5. Step 5: Solve for x
    x = 10,110.12/88.97
  6. Step 6: Final answer
    x = 113.64

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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.