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Finding the Fourth Proportional to 168.58, 251.87 and 148.53

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Solution

The fourth proportional to 168.58, 251.87 and 148.53 is: 221.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.58 : 251.87 = 148.53 : x
  2. Step 2: Convert to fraction form
    168.58/251.87 = 148.53/x
  3. Step 3: Cross multiply
    168.58x = 251.87 × 148.53
  4. Step 4: Simplify right side
    168.58x = 37,410.25
  5. Step 5: Solve for x
    x = 37,410.25/168.58
  6. Step 6: Final answer
    x = 221.91

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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.