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Finding the Fourth Proportional to 179.41, 247.65 and 121.23

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Solution

The fourth proportional to 179.41, 247.65 and 121.23 is: 167.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.41 : 247.65 = 121.23 : x
  2. Step 2: Convert to fraction form
    179.41/247.65 = 121.23/x
  3. Step 3: Cross multiply
    179.41x = 247.65 × 121.23
  4. Step 4: Simplify right side
    179.41x = 30,021.69
  5. Step 5: Solve for x
    x = 30,021.69/179.41
  6. Step 6: Final answer
    x = 167.33

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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.