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Finding the Fourth Proportional to 166.28, 248.36 and 139.24

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Solution

The fourth proportional to 166.28, 248.36 and 139.24 is: 207.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.28 : 248.36 = 139.24 : x
  2. Step 2: Convert to fraction form
    166.28/248.36 = 139.24/x
  3. Step 3: Cross multiply
    166.28x = 248.36 × 139.24
  4. Step 4: Simplify right side
    166.28x = 34,581.65
  5. Step 5: Solve for x
    x = 34,581.65/166.28
  6. Step 6: Final answer
    x = 207.97

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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.