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Finding the Fourth Proportional to 173.38, 239.31 and 121.04

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Solution

The fourth proportional to 173.38, 239.31 and 121.04 is: 167.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.38 : 239.31 = 121.04 : x
  2. Step 2: Convert to fraction form
    173.38/239.31 = 121.04/x
  3. Step 3: Cross multiply
    173.38x = 239.31 × 121.04
  4. Step 4: Simplify right side
    173.38x = 28,964.28
  5. Step 5: Solve for x
    x = 28,964.28/173.38
  6. Step 6: Final answer
    x = 167.06

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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.