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Finding the Fourth Proportional to 173.68, 239.40 and 158.80

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Solution

The fourth proportional to 173.68, 239.40 and 158.80 is: 218.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.68 : 239.40 = 158.80 : x
  2. Step 2: Convert to fraction form
    173.68/239.40 = 158.80/x
  3. Step 3: Cross multiply
    173.68x = 239.40 × 158.80
  4. Step 4: Simplify right side
    173.68x = 38,016.72
  5. Step 5: Solve for x
    x = 38,016.72/173.68
  6. Step 6: Final answer
    x = 218.89

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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.