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Finding the Fourth Proportional to 164.94, 227.16 and 128.22

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Solution

The fourth proportional to 164.94, 227.16 and 128.22 is: 176.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.94 : 227.16 = 128.22 : x
  2. Step 2: Convert to fraction form
    164.94/227.16 = 128.22/x
  3. Step 3: Cross multiply
    164.94x = 227.16 × 128.22
  4. Step 4: Simplify right side
    164.94x = 29,126.46
  5. Step 5: Solve for x
    x = 29,126.46/164.94
  6. Step 6: Final answer
    x = 176.59

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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.