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Finding the Fourth Proportional to 179.22, 247.62 and 142.69

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Solution

The fourth proportional to 179.22, 247.62 and 142.69 is: 197.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.22 : 247.62 = 142.69 : x
  2. Step 2: Convert to fraction form
    179.22/247.62 = 142.69/x
  3. Step 3: Cross multiply
    179.22x = 247.62 × 142.69
  4. Step 4: Simplify right side
    179.22x = 35,332.90
  5. Step 5: Solve for x
    x = 35,332.90/179.22
  6. Step 6: Final answer
    x = 197.15

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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.