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Finding the Fourth Proportional to 120.94, 167.05 and 102.71

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Solution

The fourth proportional to 120.94, 167.05 and 102.71 is: 141.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.94 : 167.05 = 102.71 : x
  2. Step 2: Convert to fraction form
    120.94/167.05 = 102.71/x
  3. Step 3: Cross multiply
    120.94x = 167.05 × 102.71
  4. Step 4: Simplify right side
    120.94x = 17,158.25
  5. Step 5: Solve for x
    x = 17,158.25/120.94
  6. Step 6: Final answer
    x = 141.88

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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.