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Finding the Fourth Proportional to 174.60, 261.72 and 120.30

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Solution

The fourth proportional to 174.60, 261.72 and 120.30 is: 180.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.60 : 261.72 = 120.30 : x
  2. Step 2: Convert to fraction form
    174.60/261.72 = 120.30/x
  3. Step 3: Cross multiply
    174.60x = 261.72 × 120.30
  4. Step 4: Simplify right side
    174.60x = 31,484.92
  5. Step 5: Solve for x
    x = 31,484.92/174.60
  6. Step 6: Final answer
    x = 180.33

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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.