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Finding the Fourth Proportional to 174.80, 261.72 and 89.12

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Solution

The fourth proportional to 174.80, 261.72 and 89.12 is: 133.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.80 : 261.72 = 89.12 : x
  2. Step 2: Convert to fraction form
    174.80/261.72 = 89.12/x
  3. Step 3: Cross multiply
    174.80x = 261.72 × 89.12
  4. Step 4: Simplify right side
    174.80x = 23,324.49
  5. Step 5: Solve for x
    x = 23,324.49/174.80
  6. Step 6: Final answer
    x = 133.44

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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.