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Finding the Fourth Proportional to 68.91, 102.60 and 67.95

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Solution

The fourth proportional to 68.91, 102.60 and 67.95 is: 101.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.91 : 102.60 = 67.95 : x
  2. Step 2: Convert to fraction form
    68.91/102.60 = 67.95/x
  3. Step 3: Cross multiply
    68.91x = 102.60 × 67.95
  4. Step 4: Simplify right side
    68.91x = 6,971.67
  5. Step 5: Solve for x
    x = 6,971.67/68.91
  6. Step 6: Final answer
    x = 101.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.