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Finding the Fourth Proportional to 179.30, 247.20 and 121.26

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Solution

The fourth proportional to 179.30, 247.20 and 121.26 is: 167.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.30 : 247.20 = 121.26 : x
  2. Step 2: Convert to fraction form
    179.30/247.20 = 121.26/x
  3. Step 3: Cross multiply
    179.30x = 247.20 × 121.26
  4. Step 4: Simplify right side
    179.30x = 29,975.47
  5. Step 5: Solve for x
    x = 29,975.47/179.30
  6. Step 6: Final answer
    x = 167.18

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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.