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Finding the Fourth Proportional to 144.05, 198.92 and 102.67

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Solution

The fourth proportional to 144.05, 198.92 and 102.67 is: 141.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.05 : 198.92 = 102.67 : x
  2. Step 2: Convert to fraction form
    144.05/198.92 = 102.67/x
  3. Step 3: Cross multiply
    144.05x = 198.92 × 102.67
  4. Step 4: Simplify right side
    144.05x = 20,422.88
  5. Step 5: Solve for x
    x = 20,422.88/144.05
  6. Step 6: Final answer
    x = 141.78

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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.