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Finding the Fourth Proportional to 123.56, 169.48 and 122.54

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Solution

The fourth proportional to 123.56, 169.48 and 122.54 is: 168.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.56 : 169.48 = 122.54 : x
  2. Step 2: Convert to fraction form
    123.56/169.48 = 122.54/x
  3. Step 3: Cross multiply
    123.56x = 169.48 × 122.54
  4. Step 4: Simplify right side
    123.56x = 20,768.08
  5. Step 5: Solve for x
    x = 20,768.08/123.56
  6. Step 6: Final answer
    x = 168.08

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.