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Finding the Fourth Proportional to 179.76, 247.98 and 121.44

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Solution

The fourth proportional to 179.76, 247.98 and 121.44 is: 167.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.76 : 247.98 = 121.44 : x
  2. Step 2: Convert to fraction form
    179.76/247.98 = 121.44/x
  3. Step 3: Cross multiply
    179.76x = 247.98 × 121.44
  4. Step 4: Simplify right side
    179.76x = 30,114.69
  5. Step 5: Solve for x
    x = 30,114.69/179.76
  6. Step 6: Final answer
    x = 167.53

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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.