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Finding the Fourth Proportional to 68.69, 94.60 and 62.21

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Solution

The fourth proportional to 68.69, 94.60 and 62.21 is: 85.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.69 : 94.60 = 62.21 : x
  2. Step 2: Convert to fraction form
    68.69/94.60 = 62.21/x
  3. Step 3: Cross multiply
    68.69x = 94.60 × 62.21
  4. Step 4: Simplify right side
    68.69x = 5,885.07
  5. Step 5: Solve for x
    x = 5,885.07/68.69
  6. Step 6: Final answer
    x = 85.68

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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.