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Finding the Fourth Proportional to 170.89, 235.81 and 97.21

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Solution

The fourth proportional to 170.89, 235.81 and 97.21 is: 134.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.89 : 235.81 = 97.21 : x
  2. Step 2: Convert to fraction form
    170.89/235.81 = 97.21/x
  3. Step 3: Cross multiply
    170.89x = 235.81 × 97.21
  4. Step 4: Simplify right side
    170.89x = 22,923.09
  5. Step 5: Solve for x
    x = 22,923.09/170.89
  6. Step 6: Final answer
    x = 134.14

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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.