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Finding the Fourth Proportional to 166.64, 229.79 and 143.41

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Solution

The fourth proportional to 166.64, 229.79 and 143.41 is: 197.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.64 : 229.79 = 143.41 : x
  2. Step 2: Convert to fraction form
    166.64/229.79 = 143.41/x
  3. Step 3: Cross multiply
    166.64x = 229.79 × 143.41
  4. Step 4: Simplify right side
    166.64x = 32,952.32
  5. Step 5: Solve for x
    x = 32,952.32/166.64
  6. Step 6: Final answer
    x = 197.75

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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.