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Finding the Fourth Proportional to 161.15, 222.17 and 105.84

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Solution

The fourth proportional to 161.15, 222.17 and 105.84 is: 145.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.15 : 222.17 = 105.84 : x
  2. Step 2: Convert to fraction form
    161.15/222.17 = 105.84/x
  3. Step 3: Cross multiply
    161.15x = 222.17 × 105.84
  4. Step 4: Simplify right side
    161.15x = 23,513.94
  5. Step 5: Solve for x
    x = 23,513.94/161.15
  6. Step 6: Final answer
    x = 145.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.