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Finding the Fourth Proportional to 164.70, 227.31 and 99.22

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Solution

The fourth proportional to 164.70, 227.31 and 99.22 is: 136.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.70 : 227.31 = 99.22 : x
  2. Step 2: Convert to fraction form
    164.70/227.31 = 99.22/x
  3. Step 3: Cross multiply
    164.70x = 227.31 × 99.22
  4. Step 4: Simplify right side
    164.70x = 22,553.70
  5. Step 5: Solve for x
    x = 22,553.70/164.70
  6. Step 6: Final answer
    x = 136.94

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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.