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Finding the Fourth Proportional to 169.74, 233.91 and 111.42

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Solution

The fourth proportional to 169.74, 233.91 and 111.42 is: 153.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.74 : 233.91 = 111.42 : x
  2. Step 2: Convert to fraction form
    169.74/233.91 = 111.42/x
  3. Step 3: Cross multiply
    169.74x = 233.91 × 111.42
  4. Step 4: Simplify right side
    169.74x = 26,062.25
  5. Step 5: Solve for x
    x = 26,062.25/169.74
  6. Step 6: Final answer
    x = 153.54

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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.