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Finding the Fourth Proportional to 164.33, 246.19 and 81.97

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Solution

The fourth proportional to 164.33, 246.19 and 81.97 is: 122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.33 : 246.19 = 81.97 : x
  2. Step 2: Convert to fraction form
    164.33/246.19 = 81.97/x
  3. Step 3: Cross multiply
    164.33x = 246.19 × 81.97
  4. Step 4: Simplify right side
    164.33x = 20,180.19
  5. Step 5: Solve for x
    x = 20,180.19/164.33
  6. Step 6: Final answer
    x = 122.80

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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.