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Finding the Fourth Proportional to 170.78, 235.63 and 97.09

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Solution

The fourth proportional to 170.78, 235.63 and 97.09 is: 133.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.78 : 235.63 = 97.09 : x
  2. Step 2: Convert to fraction form
    170.78/235.63 = 97.09/x
  3. Step 3: Cross multiply
    170.78x = 235.63 × 97.09
  4. Step 4: Simplify right side
    170.78x = 22,876.48
  5. Step 5: Solve for x
    x = 22,876.48/170.78
  6. Step 6: Final answer
    x = 133.95

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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.