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Finding the Fourth Proportional to 68.33, 102.86 and 61.26

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Solution

The fourth proportional to 68.33, 102.86 and 61.26 is: 92.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.33 : 102.86 = 61.26 : x
  2. Step 2: Convert to fraction form
    68.33/102.86 = 61.26/x
  3. Step 3: Cross multiply
    68.33x = 102.86 × 61.26
  4. Step 4: Simplify right side
    68.33x = 6,300.90
  5. Step 5: Solve for x
    x = 6,300.90/68.33
  6. Step 6: Final answer
    x = 92.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.