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Finding the Fourth Proportional to 168.85, 251.93 and 148.60

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Solution

The fourth proportional to 168.85, 251.93 and 148.60 is: 221.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.85 : 251.93 = 148.60 : x
  2. Step 2: Convert to fraction form
    168.85/251.93 = 148.60/x
  3. Step 3: Cross multiply
    168.85x = 251.93 × 148.60
  4. Step 4: Simplify right side
    168.85x = 37,436.80
  5. Step 5: Solve for x
    x = 37,436.80/168.85
  6. Step 6: Final answer
    x = 221.72

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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.