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Finding the Fourth Proportional to 168.12, 251.56 and 105.60

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Solution

The fourth proportional to 168.12, 251.56 and 105.60 is: 158.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.12 : 251.56 = 105.60 : x
  2. Step 2: Convert to fraction form
    168.12/251.56 = 105.60/x
  3. Step 3: Cross multiply
    168.12x = 251.56 × 105.60
  4. Step 4: Simplify right side
    168.12x = 26,564.74
  5. Step 5: Solve for x
    x = 26,564.74/168.12
  6. Step 6: Final answer
    x = 158.01

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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.