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Finding the Fourth Proportional to 173.98, 239.91 and 115.66

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Solution

The fourth proportional to 173.98, 239.91 and 115.66 is: 159.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.98 : 239.91 = 115.66 : x
  2. Step 2: Convert to fraction form
    173.98/239.91 = 115.66/x
  3. Step 3: Cross multiply
    173.98x = 239.91 × 115.66
  4. Step 4: Simplify right side
    173.98x = 27,747.99
  5. Step 5: Solve for x
    x = 27,747.99/173.98
  6. Step 6: Final answer
    x = 159.49

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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.