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Finding the Fourth Proportional to 173.27, 239.20 and 107.80

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Solution

The fourth proportional to 173.27, 239.20 and 107.80 is: 148.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.27 : 239.20 = 107.80 : x
  2. Step 2: Convert to fraction form
    173.27/239.20 = 107.80/x
  3. Step 3: Cross multiply
    173.27x = 239.20 × 107.80
  4. Step 4: Simplify right side
    173.27x = 25,785.50
  5. Step 5: Solve for x
    x = 25,785.50/173.27
  6. Step 6: Final answer
    x = 148.81

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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.