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Finding the Fourth Proportional to 96.34, 132.21 and 87.11

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Solution

The fourth proportional to 96.34, 132.21 and 87.11 is: 119.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.34 : 132.21 = 87.11 : x
  2. Step 2: Convert to fraction form
    96.34/132.21 = 87.11/x
  3. Step 3: Cross multiply
    96.34x = 132.21 × 87.11
  4. Step 4: Simplify right side
    96.34x = 11,516.15
  5. Step 5: Solve for x
    x = 11,516.15/96.34
  6. Step 6: Final answer
    x = 119.54

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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.