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Finding the Fourth Proportional to 68.66, 93.56 and 68.42

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Solution

The fourth proportional to 68.66, 93.56 and 68.42 is: 93.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.66 : 93.56 = 68.42 : x
  2. Step 2: Convert to fraction form
    68.66/93.56 = 68.42/x
  3. Step 3: Cross multiply
    68.66x = 93.56 × 68.42
  4. Step 4: Simplify right side
    68.66x = 6,401.38
  5. Step 5: Solve for x
    x = 6,401.38/68.66
  6. Step 6: Final answer
    x = 93.23

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.