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Finding the Fourth Proportional to 70.62, 97.94 and 68.39

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Solution

The fourth proportional to 70.62, 97.94 and 68.39 is: 94.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.62 : 97.94 = 68.39 : x
  2. Step 2: Convert to fraction form
    70.62/97.94 = 68.39/x
  3. Step 3: Cross multiply
    70.62x = 97.94 × 68.39
  4. Step 4: Simplify right side
    70.62x = 6,698.02
  5. Step 5: Solve for x
    x = 6,698.02/70.62
  6. Step 6: Final answer
    x = 94.85

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.