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Finding the Fourth Proportional to 68.23, 102.36 and 42.61

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Solution

The fourth proportional to 68.23, 102.36 and 42.61 is: 63.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.23 : 102.36 = 42.61 : x
  2. Step 2: Convert to fraction form
    68.23/102.36 = 42.61/x
  3. Step 3: Cross multiply
    68.23x = 102.36 × 42.61
  4. Step 4: Simplify right side
    68.23x = 4,361.66
  5. Step 5: Solve for x
    x = 4,361.66/68.23
  6. Step 6: Final answer
    x = 63.93

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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.