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Finding the Fourth Proportional to 120.32, 166.88 and 115.52

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Solution

The fourth proportional to 120.32, 166.88 and 115.52 is: 160.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.32 : 166.88 = 115.52 : x
  2. Step 2: Convert to fraction form
    120.32/166.88 = 115.52/x
  3. Step 3: Cross multiply
    120.32x = 166.88 × 115.52
  4. Step 4: Simplify right side
    120.32x = 19,277.98
  5. Step 5: Solve for x
    x = 19,277.98/120.32
  6. Step 6: Final answer
    x = 160.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.