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Finding the Fourth Proportional to 169.79, 254.49 and 72.26

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Solution

The fourth proportional to 169.79, 254.49 and 72.26 is: 108.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.79 : 254.49 = 72.26 : x
  2. Step 2: Convert to fraction form
    169.79/254.49 = 72.26/x
  3. Step 3: Cross multiply
    169.79x = 254.49 × 72.26
  4. Step 4: Simplify right side
    169.79x = 18,388.17
  5. Step 5: Solve for x
    x = 18,388.17/169.79
  6. Step 6: Final answer
    x = 108.30

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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.