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Finding the Fourth Proportional to 167.78, 231.48 and 102.30

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Solution

The fourth proportional to 167.78, 231.48 and 102.30 is: 141.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.78 : 231.48 = 102.30 : x
  2. Step 2: Convert to fraction form
    167.78/231.48 = 102.30/x
  3. Step 3: Cross multiply
    167.78x = 231.48 × 102.30
  4. Step 4: Simplify right side
    167.78x = 23,680.40
  5. Step 5: Solve for x
    x = 23,680.40/167.78
  6. Step 6: Final answer
    x = 141.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.