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Finding the Fourth Proportional to 173.08, 239.20 and 126.72

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Solution

The fourth proportional to 173.08, 239.20 and 126.72 is: 175.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.08 : 239.20 = 126.72 : x
  2. Step 2: Convert to fraction form
    173.08/239.20 = 126.72/x
  3. Step 3: Cross multiply
    173.08x = 239.20 × 126.72
  4. Step 4: Simplify right side
    173.08x = 30,311.42
  5. Step 5: Solve for x
    x = 30,311.42/173.08
  6. Step 6: Final answer
    x = 175.13

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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.