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Finding the Fourth Proportional to 96.33, 132.81 and 87.69

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Solution

The fourth proportional to 96.33, 132.81 and 87.69 is: 120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.33 : 132.81 = 87.69 : x
  2. Step 2: Convert to fraction form
    96.33/132.81 = 87.69/x
  3. Step 3: Cross multiply
    96.33x = 132.81 × 87.69
  4. Step 4: Simplify right side
    96.33x = 11,646.11
  5. Step 5: Solve for x
    x = 11,646.11/96.33
  6. Step 6: Final answer
    x = 120.90

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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.