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Finding the Fourth Proportional to 167.55, 251.33 and 76.19

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Solution

The fourth proportional to 167.55, 251.33 and 76.19 is: 114.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.55 : 251.33 = 76.19 : x
  2. Step 2: Convert to fraction form
    167.55/251.33 = 76.19/x
  3. Step 3: Cross multiply
    167.55x = 251.33 × 76.19
  4. Step 4: Simplify right side
    167.55x = 19,147.20
  5. Step 5: Solve for x
    x = 19,147.20/167.55
  6. Step 6: Final answer
    x = 114.28

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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.