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Finding the Fourth Proportional to 121.48, 167.26 and 105.08

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Solution

The fourth proportional to 121.48, 167.26 and 105.08 is: 144.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.48 : 167.26 = 105.08 : x
  2. Step 2: Convert to fraction form
    121.48/167.26 = 105.08/x
  3. Step 3: Cross multiply
    121.48x = 167.26 × 105.08
  4. Step 4: Simplify right side
    121.48x = 17,575.68
  5. Step 5: Solve for x
    x = 17,575.68/121.48
  6. Step 6: Final answer
    x = 144.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.