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Finding the Fourth Proportional to 68.23, 94.12 and 66.25

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Solution

The fourth proportional to 68.23, 94.12 and 66.25 is: 91.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.23 : 94.12 = 66.25 : x
  2. Step 2: Convert to fraction form
    68.23/94.12 = 66.25/x
  3. Step 3: Cross multiply
    68.23x = 94.12 × 66.25
  4. Step 4: Simplify right side
    68.23x = 6,235.45
  5. Step 5: Solve for x
    x = 6,235.45/68.23
  6. Step 6: Final answer
    x = 91.39

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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.