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Finding the Fourth Proportional to 169.37, 254.11 and 143.76

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Solution

The fourth proportional to 169.37, 254.11 and 143.76 is: 215.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.37 : 254.11 = 143.76 : x
  2. Step 2: Convert to fraction form
    169.37/254.11 = 143.76/x
  3. Step 3: Cross multiply
    169.37x = 254.11 × 143.76
  4. Step 4: Simplify right side
    169.37x = 36,530.49
  5. Step 5: Solve for x
    x = 36,530.49/169.37
  6. Step 6: Final answer
    x = 215.68

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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.