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Finding the Fourth Proportional to 161.12, 222.26 and 105.83

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Solution

The fourth proportional to 161.12, 222.26 and 105.83 is: 145.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.12 : 222.26 = 105.83 : x
  2. Step 2: Convert to fraction form
    161.12/222.26 = 105.83/x
  3. Step 3: Cross multiply
    161.12x = 222.26 × 105.83
  4. Step 4: Simplify right side
    161.12x = 23,520.14
  5. Step 5: Solve for x
    x = 23,520.14/161.12
  6. Step 6: Final answer
    x = 145.98

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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.