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Finding the Fourth Proportional to 173.76, 239.65 and 108.14

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Solution

The fourth proportional to 173.76, 239.65 and 108.14 is: 149.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.76 : 239.65 = 108.14 : x
  2. Step 2: Convert to fraction form
    173.76/239.65 = 108.14/x
  3. Step 3: Cross multiply
    173.76x = 239.65 × 108.14
  4. Step 4: Simplify right side
    173.76x = 25,915.75
  5. Step 5: Solve for x
    x = 25,915.75/173.76
  6. Step 6: Final answer
    x = 149.15

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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.