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Finding the Fourth Proportional to 173.20, 239.20 and 117.84

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Solution

The fourth proportional to 173.20, 239.20 and 117.84 is: 162.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.20 : 239.20 = 117.84 : x
  2. Step 2: Convert to fraction form
    173.20/239.20 = 117.84/x
  3. Step 3: Cross multiply
    173.20x = 239.20 × 117.84
  4. Step 4: Simplify right side
    173.20x = 28,187.25
  5. Step 5: Solve for x
    x = 28,187.25/173.20
  6. Step 6: Final answer
    x = 162.75

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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.