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Finding the Fourth Proportional to 169.35, 254.21 and 121.47

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Solution

The fourth proportional to 169.35, 254.21 and 121.47 is: 182.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.35 : 254.21 = 121.47 : x
  2. Step 2: Convert to fraction form
    169.35/254.21 = 121.47/x
  3. Step 3: Cross multiply
    169.35x = 254.21 × 121.47
  4. Step 4: Simplify right side
    169.35x = 30,878.28
  5. Step 5: Solve for x
    x = 30,878.28/169.35
  6. Step 6: Final answer
    x = 182.33

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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.