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Finding the Fourth Proportional to 166.80, 248.98 and 143.72

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Solution

The fourth proportional to 166.80, 248.98 and 143.72 is: 214.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.80 : 248.98 = 143.72 : x
  2. Step 2: Convert to fraction form
    166.80/248.98 = 143.72/x
  3. Step 3: Cross multiply
    166.80x = 248.98 × 143.72
  4. Step 4: Simplify right side
    166.80x = 35,781.80
  5. Step 5: Solve for x
    x = 35,781.80/166.80
  6. Step 6: Final answer
    x = 214.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.