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Finding the Fourth Proportional to 170.33, 234.78 and 115.05

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Solution

The fourth proportional to 170.33, 234.78 and 115.05 is: 158.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.33 : 234.78 = 115.05 : x
  2. Step 2: Convert to fraction form
    170.33/234.78 = 115.05/x
  3. Step 3: Cross multiply
    170.33x = 234.78 × 115.05
  4. Step 4: Simplify right side
    170.33x = 27,011.44
  5. Step 5: Solve for x
    x = 27,011.44/170.33
  6. Step 6: Final answer
    x = 158.58

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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.