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Finding the Fourth Proportional to 179.80, 248.18 and 143.12

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Solution

The fourth proportional to 179.80, 248.18 and 143.12 is: 197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.80 : 248.18 = 143.12 : x
  2. Step 2: Convert to fraction form
    179.80/248.18 = 143.12/x
  3. Step 3: Cross multiply
    179.80x = 248.18 × 143.12
  4. Step 4: Simplify right side
    179.80x = 35,519.52
  5. Step 5: Solve for x
    x = 35,519.52/179.80
  6. Step 6: Final answer
    x = 197.55

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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.