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Finding the Fourth Proportional to 120.32, 166.11 and 92.63

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Solution

The fourth proportional to 120.32, 166.11 and 92.63 is: 127.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.32 : 166.11 = 92.63 : x
  2. Step 2: Convert to fraction form
    120.32/166.11 = 92.63/x
  3. Step 3: Cross multiply
    120.32x = 166.11 × 92.63
  4. Step 4: Simplify right side
    120.32x = 15,386.31
  5. Step 5: Solve for x
    x = 15,386.31/120.32
  6. Step 6: Final answer
    x = 127.88

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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.