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Finding the Fourth Proportional to 161.38, 222.60 and 148.30

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Solution

The fourth proportional to 161.38, 222.60 and 148.30 is: 204.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.38 : 222.60 = 148.30 : x
  2. Step 2: Convert to fraction form
    161.38/222.60 = 148.30/x
  3. Step 3: Cross multiply
    161.38x = 222.60 × 148.30
  4. Step 4: Simplify right side
    161.38x = 33,011.58
  5. Step 5: Solve for x
    x = 33,011.58/161.38
  6. Step 6: Final answer
    x = 204.56

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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.