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Finding the Fourth Proportional to 164.38, 226.68 and 122.80

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Solution

The fourth proportional to 164.38, 226.68 and 122.80 is: 169.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.38 : 226.68 = 122.80 : x
  2. Step 2: Convert to fraction form
    164.38/226.68 = 122.80/x
  3. Step 3: Cross multiply
    164.38x = 226.68 × 122.80
  4. Step 4: Simplify right side
    164.38x = 27,836.30
  5. Step 5: Solve for x
    x = 27,836.30/164.38
  6. Step 6: Final answer
    x = 169.34

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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.