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Finding the Fourth Proportional to 174.09, 240.28 and 121.61

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Solution

The fourth proportional to 174.09, 240.28 and 121.61 is: 167.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.09 : 240.28 = 121.61 : x
  2. Step 2: Convert to fraction form
    174.09/240.28 = 121.61/x
  3. Step 3: Cross multiply
    174.09x = 240.28 × 121.61
  4. Step 4: Simplify right side
    174.09x = 29,220.75
  5. Step 5: Solve for x
    x = 29,220.75/174.09
  6. Step 6: Final answer
    x = 167.85

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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.