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Finding the Fourth Proportional to 169.81, 254.79 and 72.37

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Solution

The fourth proportional to 169.81, 254.79 and 72.37 is: 108.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.81 : 254.79 = 72.37 : x
  2. Step 2: Convert to fraction form
    169.81/254.79 = 72.37/x
  3. Step 3: Cross multiply
    169.81x = 254.79 × 72.37
  4. Step 4: Simplify right side
    169.81x = 18,439.15
  5. Step 5: Solve for x
    x = 18,439.15/169.81
  6. Step 6: Final answer
    x = 108.59

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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.