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Finding the Fourth Proportional to 124.68, 171.04 and 121.48

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Solution

The fourth proportional to 124.68, 171.04 and 121.48 is: 166.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.68 : 171.04 = 121.48 : x
  2. Step 2: Convert to fraction form
    124.68/171.04 = 121.48/x
  3. Step 3: Cross multiply
    124.68x = 171.04 × 121.48
  4. Step 4: Simplify right side
    124.68x = 20,777.94
  5. Step 5: Solve for x
    x = 20,777.94/124.68
  6. Step 6: Final answer
    x = 166.65

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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.