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Finding the Fourth Proportional to 68.54, 102.15 and 68.44

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Solution

The fourth proportional to 68.54, 102.15 and 68.44 is: 102.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.54 : 102.15 = 68.44 : x
  2. Step 2: Convert to fraction form
    68.54/102.15 = 68.44/x
  3. Step 3: Cross multiply
    68.54x = 102.15 × 68.44
  4. Step 4: Simplify right side
    68.54x = 6,991.10
  5. Step 5: Solve for x
    x = 6,991.10/68.54
  6. Step 6: Final answer
    x = 102.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.