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Finding the Fourth Proportional to 173.40, 239.24 and 103.47

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Solution

The fourth proportional to 173.40, 239.24 and 103.47 is: 142.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.40 : 239.24 = 103.47 : x
  2. Step 2: Convert to fraction form
    173.40/239.24 = 103.47/x
  3. Step 3: Cross multiply
    173.40x = 239.24 × 103.47
  4. Step 4: Simplify right side
    173.40x = 24,753.65
  5. Step 5: Solve for x
    x = 24,753.65/173.40
  6. Step 6: Final answer
    x = 142.75

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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.