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Finding the Fourth Proportional to 68.57, 94.59 and 40.89

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Solution

The fourth proportional to 68.57, 94.59 and 40.89 is: 56.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.57 : 94.59 = 40.89 : x
  2. Step 2: Convert to fraction form
    68.57/94.59 = 40.89/x
  3. Step 3: Cross multiply
    68.57x = 94.59 × 40.89
  4. Step 4: Simplify right side
    68.57x = 3,867.79
  5. Step 5: Solve for x
    x = 3,867.79/68.57
  6. Step 6: Final answer
    x = 56.41

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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.