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Finding the Fourth Proportional to 168.22, 251.30 and 140.88

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Solution

The fourth proportional to 168.22, 251.30 and 140.88 is: 210.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.22 : 251.30 = 140.88 : x
  2. Step 2: Convert to fraction form
    168.22/251.30 = 140.88/x
  3. Step 3: Cross multiply
    168.22x = 251.30 × 140.88
  4. Step 4: Simplify right side
    168.22x = 35,403.14
  5. Step 5: Solve for x
    x = 35,403.14/168.22
  6. Step 6: Final answer
    x = 210.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.