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Finding the Fourth Proportional to 174.88, 261.60 and 120.61

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Solution

The fourth proportional to 174.88, 261.60 and 120.61 is: 180.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.88 : 261.60 = 120.61 : x
  2. Step 2: Convert to fraction form
    174.88/261.60 = 120.61/x
  3. Step 3: Cross multiply
    174.88x = 261.60 × 120.61
  4. Step 4: Simplify right side
    174.88x = 31,551.58
  5. Step 5: Solve for x
    x = 31,551.58/174.88
  6. Step 6: Final answer
    x = 180.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.