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Finding the Fourth Proportional to 173.18, 239.01 and 107.71

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Solution

The fourth proportional to 173.18, 239.01 and 107.71 is: 148.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.18 : 239.01 = 107.71 : x
  2. Step 2: Convert to fraction form
    173.18/239.01 = 107.71/x
  3. Step 3: Cross multiply
    173.18x = 239.01 × 107.71
  4. Step 4: Simplify right side
    173.18x = 25,743.77
  5. Step 5: Solve for x
    x = 25,743.77/173.18
  6. Step 6: Final answer
    x = 148.65

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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.