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Finding the Fourth Proportional to 68.12, 94.64 and 67.46

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Solution

The fourth proportional to 68.12, 94.64 and 67.46 is: 93.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.12 : 94.64 = 67.46 : x
  2. Step 2: Convert to fraction form
    68.12/94.64 = 67.46/x
  3. Step 3: Cross multiply
    68.12x = 94.64 × 67.46
  4. Step 4: Simplify right side
    68.12x = 6,384.41
  5. Step 5: Solve for x
    x = 6,384.41/68.12
  6. Step 6: Final answer
    x = 93.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.