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Finding the Fourth Proportional to 195.16, 268.86 and 161.76

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Solution

The fourth proportional to 195.16, 268.86 and 161.76 is: 222.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.16 : 268.86 = 161.76 : x
  2. Step 2: Convert to fraction form
    195.16/268.86 = 161.76/x
  3. Step 3: Cross multiply
    195.16x = 268.86 × 161.76
  4. Step 4: Simplify right side
    195.16x = 43,490.79
  5. Step 5: Solve for x
    x = 43,490.79/195.16
  6. Step 6: Final answer
    x = 222.85

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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.