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Finding the Fourth Proportional to 166.72, 230.09 and 96.78

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Solution

The fourth proportional to 166.72, 230.09 and 96.78 is: 133.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.72 : 230.09 = 96.78 : x
  2. Step 2: Convert to fraction form
    166.72/230.09 = 96.78/x
  3. Step 3: Cross multiply
    166.72x = 230.09 × 96.78
  4. Step 4: Simplify right side
    166.72x = 22,267.63
  5. Step 5: Solve for x
    x = 22,267.63/166.72
  6. Step 6: Final answer
    x = 133.57

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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.