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Finding the Fourth Proportional to 161.19, 222.29 and 143.49

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Solution

The fourth proportional to 161.19, 222.29 and 143.49 is: 197.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.19 : 222.29 = 143.49 : x
  2. Step 2: Convert to fraction form
    161.19/222.29 = 143.49/x
  3. Step 3: Cross multiply
    161.19x = 222.29 × 143.49
  4. Step 4: Simplify right side
    161.19x = 31,896.39
  5. Step 5: Solve for x
    x = 31,896.39/161.19
  6. Step 6: Final answer
    x = 197.88

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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.