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Finding the Fourth Proportional to 68.56, 94.57 and 45.25

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Solution

The fourth proportional to 68.56, 94.57 and 45.25 is: 62.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.56 : 94.57 = 45.25 : x
  2. Step 2: Convert to fraction form
    68.56/94.57 = 45.25/x
  3. Step 3: Cross multiply
    68.56x = 94.57 × 45.25
  4. Step 4: Simplify right side
    68.56x = 4,279.29
  5. Step 5: Solve for x
    x = 4,279.29/68.56
  6. Step 6: Final answer
    x = 62.42

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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.