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Finding the Fourth Proportional to 166.08, 248.66 and 84.75

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Solution

The fourth proportional to 166.08, 248.66 and 84.75 is: 126.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.08 : 248.66 = 84.75 : x
  2. Step 2: Convert to fraction form
    166.08/248.66 = 84.75/x
  3. Step 3: Cross multiply
    166.08x = 248.66 × 84.75
  4. Step 4: Simplify right side
    166.08x = 21,073.94
  5. Step 5: Solve for x
    x = 21,073.94/166.08
  6. Step 6: Final answer
    x = 126.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.