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Finding the Fourth Proportional to 169.81, 234.38 and 142.13

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Solution

The fourth proportional to 169.81, 234.38 and 142.13 is: 196.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.81 : 234.38 = 142.13 : x
  2. Step 2: Convert to fraction form
    169.81/234.38 = 142.13/x
  3. Step 3: Cross multiply
    169.81x = 234.38 × 142.13
  4. Step 4: Simplify right side
    169.81x = 33,312.43
  5. Step 5: Solve for x
    x = 33,312.43/169.81
  6. Step 6: Final answer
    x = 196.17

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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.