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Finding the Fourth Proportional to 164.43, 227.09 and 128.03

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Solution

The fourth proportional to 164.43, 227.09 and 128.03 is: 176.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.43 : 227.09 = 128.03 : x
  2. Step 2: Convert to fraction form
    164.43/227.09 = 128.03/x
  3. Step 3: Cross multiply
    164.43x = 227.09 × 128.03
  4. Step 4: Simplify right side
    164.43x = 29,073.52
  5. Step 5: Solve for x
    x = 29,073.52/164.43
  6. Step 6: Final answer
    x = 176.81

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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.