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Finding the Fourth Proportional to 174, 261.12 and 109.20

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Solution

The fourth proportional to 174, 261.12 and 109.20 is: 163.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    174 : 261.12 = 109.20 : x
  2. Step 2: Convert to fraction form
    174/261.12 = 109.20/x
  3. Step 3: Cross multiply
    174x = 261.12 × 109.20
  4. Step 4: Simplify right side
    174x = 28,514.30
  5. Step 5: Solve for x
    x = 28,514.30/174
  6. Step 6: Final answer
    x = 163.88

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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.