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Finding the Fourth Proportional to 68.67, 94.14 and 67.45

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Solution

The fourth proportional to 68.67, 94.14 and 67.45 is: 92.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.67 : 94.14 = 67.45 : x
  2. Step 2: Convert to fraction form
    68.67/94.14 = 67.45/x
  3. Step 3: Cross multiply
    68.67x = 94.14 × 67.45
  4. Step 4: Simplify right side
    68.67x = 6,349.74
  5. Step 5: Solve for x
    x = 6,349.74/68.67
  6. Step 6: Final answer
    x = 92.47

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.