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Finding the Fourth Proportional to 169.94, 234.56 and 111.68

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Solution

The fourth proportional to 169.94, 234.56 and 111.68 is: 154.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.94 : 234.56 = 111.68 : x
  2. Step 2: Convert to fraction form
    169.94/234.56 = 111.68/x
  3. Step 3: Cross multiply
    169.94x = 234.56 × 111.68
  4. Step 4: Simplify right side
    169.94x = 26,195.66
  5. Step 5: Solve for x
    x = 26,195.66/169.94
  6. Step 6: Final answer
    x = 154.15

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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.