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Finding the Fourth Proportional to 170.85, 235.69 and 115.56

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Solution

The fourth proportional to 170.85, 235.69 and 115.56 is: 159.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.85 : 235.69 = 115.56 : x
  2. Step 2: Convert to fraction form
    170.85/235.69 = 115.56/x
  3. Step 3: Cross multiply
    170.85x = 235.69 × 115.56
  4. Step 4: Simplify right side
    170.85x = 27,237.07
  5. Step 5: Solve for x
    x = 27,237.07/170.85
  6. Step 6: Final answer
    x = 159.43

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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.