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Finding the Fourth Proportional to 161, 222.18 and 102.79

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Solution

The fourth proportional to 161, 222.18 and 102.79 is: 141.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    161 : 222.18 = 102.79 : x
  2. Step 2: Convert to fraction form
    161/222.18 = 102.79/x
  3. Step 3: Cross multiply
    161x = 222.18 × 102.79
  4. Step 4: Simplify right side
    161x = 22,836.77
  5. Step 5: Solve for x
    x = 22,836.77/161
  6. Step 6: Final answer
    x = 141.84

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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.