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Finding the Fourth Proportional to 161.28, 222.62 and 103.14

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Solution

The fourth proportional to 161.28, 222.62 and 103.14 is: 142.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.28 : 222.62 = 103.14 : x
  2. Step 2: Convert to fraction form
    161.28/222.62 = 103.14/x
  3. Step 3: Cross multiply
    161.28x = 222.62 × 103.14
  4. Step 4: Simplify right side
    161.28x = 22,961.03
  5. Step 5: Solve for x
    x = 22,961.03/161.28
  6. Step 6: Final answer
    x = 142.37

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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.