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Finding the Fourth Proportional to 161.01, 222.01 and 105.72

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Solution

The fourth proportional to 161.01, 222.01 and 105.72 is: 145.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.01 : 222.01 = 105.72 : x
  2. Step 2: Convert to fraction form
    161.01/222.01 = 105.72/x
  3. Step 3: Cross multiply
    161.01x = 222.01 × 105.72
  4. Step 4: Simplify right side
    161.01x = 23,469.80
  5. Step 5: Solve for x
    x = 23,469.80/161.01
  6. Step 6: Final answer
    x = 145.77

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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.