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Finding the Fourth Proportional to 68.12, 102.22 and 58.08

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Solution

The fourth proportional to 68.12, 102.22 and 58.08 is: 87.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.12 : 102.22 = 58.08 : x
  2. Step 2: Convert to fraction form
    68.12/102.22 = 58.08/x
  3. Step 3: Cross multiply
    68.12x = 102.22 × 58.08
  4. Step 4: Simplify right side
    68.12x = 5,936.94
  5. Step 5: Solve for x
    x = 5,936.94/68.12
  6. Step 6: Final answer
    x = 87.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.