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Finding the Fourth Proportional to 169.74, 234.09 and 147.78

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Solution

The fourth proportional to 169.74, 234.09 and 147.78 is: 203.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.74 : 234.09 = 147.78 : x
  2. Step 2: Convert to fraction form
    169.74/234.09 = 147.78/x
  3. Step 3: Cross multiply
    169.74x = 234.09 × 147.78
  4. Step 4: Simplify right side
    169.74x = 34,593.82
  5. Step 5: Solve for x
    x = 34,593.82/169.74
  6. Step 6: Final answer
    x = 203.80

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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.