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Finding the Fourth Proportional to 166.02, 248.91 and 84.70

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Solution

The fourth proportional to 166.02, 248.91 and 84.70 is: 126.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.02 : 248.91 = 84.70 : x
  2. Step 2: Convert to fraction form
    166.02/248.91 = 84.70/x
  3. Step 3: Cross multiply
    166.02x = 248.91 × 84.70
  4. Step 4: Simplify right side
    166.02x = 21,082.68
  5. Step 5: Solve for x
    x = 21,082.68/166.02
  6. Step 6: Final answer
    x = 126.99

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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.