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Finding the Fourth Proportional to 169.56, 234.07 and 138.81

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Solution

The fourth proportional to 169.56, 234.07 and 138.81 is: 191.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.56 : 234.07 = 138.81 : x
  2. Step 2: Convert to fraction form
    169.56/234.07 = 138.81/x
  3. Step 3: Cross multiply
    169.56x = 234.07 × 138.81
  4. Step 4: Simplify right side
    169.56x = 32,490.59
  5. Step 5: Solve for x
    x = 32,490.59/169.56
  6. Step 6: Final answer
    x = 191.62

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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.