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Finding the Fourth Proportional to 120.71, 166.41 and 92.97

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Solution

The fourth proportional to 120.71, 166.41 and 92.97 is: 128.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.71 : 166.41 = 92.97 : x
  2. Step 2: Convert to fraction form
    120.71/166.41 = 92.97/x
  3. Step 3: Cross multiply
    120.71x = 166.41 × 92.97
  4. Step 4: Simplify right side
    120.71x = 15,471.14
  5. Step 5: Solve for x
    x = 15,471.14/120.71
  6. Step 6: Final answer
    x = 128.17

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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.