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Finding the Fourth Proportional to 161.49, 222.04 and 143.84

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Solution

The fourth proportional to 161.49, 222.04 and 143.84 is: 197.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.49 : 222.04 = 143.84 : x
  2. Step 2: Convert to fraction form
    161.49/222.04 = 143.84/x
  3. Step 3: Cross multiply
    161.49x = 222.04 × 143.84
  4. Step 4: Simplify right side
    161.49x = 31,938.97
  5. Step 5: Solve for x
    x = 31,938.97/161.49
  6. Step 6: Final answer
    x = 197.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.