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Finding the Fourth Proportional to 67.75, 102.07 and 61.58

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Solution

The fourth proportional to 67.75, 102.07 and 61.58 is: 92.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.75 : 102.07 = 61.58 : x
  2. Step 2: Convert to fraction form
    67.75/102.07 = 61.58/x
  3. Step 3: Cross multiply
    67.75x = 102.07 × 61.58
  4. Step 4: Simplify right side
    67.75x = 6,285.47
  5. Step 5: Solve for x
    x = 6,285.47/67.75
  6. Step 6: Final answer
    x = 92.77

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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.