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Finding the Fourth Proportional to 68.22, 94.15 and 40.22

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Solution

The fourth proportional to 68.22, 94.15 and 40.22 is: 55.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.22 : 94.15 = 40.22 : x
  2. Step 2: Convert to fraction form
    68.22/94.15 = 40.22/x
  3. Step 3: Cross multiply
    68.22x = 94.15 × 40.22
  4. Step 4: Simplify right side
    68.22x = 3,786.71
  5. Step 5: Solve for x
    x = 3,786.71/68.22
  6. Step 6: Final answer
    x = 55.51

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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.