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Finding the Fourth Proportional to 68.44, 102.10 and 58.18

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Solution

The fourth proportional to 68.44, 102.10 and 58.18 is: 86.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.44 : 102.10 = 58.18 : x
  2. Step 2: Convert to fraction form
    68.44/102.10 = 58.18/x
  3. Step 3: Cross multiply
    68.44x = 102.10 × 58.18
  4. Step 4: Simplify right side
    68.44x = 5,940.18
  5. Step 5: Solve for x
    x = 5,940.18/68.44
  6. Step 6: Final answer
    x = 86.79

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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.