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Finding the Fourth Proportional to 169.98, 234.65 and 111.79

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Solution

The fourth proportional to 169.98, 234.65 and 111.79 is: 154.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.98 : 234.65 = 111.79 : x
  2. Step 2: Convert to fraction form
    169.98/234.65 = 111.79/x
  3. Step 3: Cross multiply
    169.98x = 234.65 × 111.79
  4. Step 4: Simplify right side
    169.98x = 26,231.52
  5. Step 5: Solve for x
    x = 26,231.52/169.98
  6. Step 6: Final answer
    x = 154.32

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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.