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Finding the Fourth Proportional to 97.78, 146.76 and 67.54

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Solution

The fourth proportional to 97.78, 146.76 and 67.54 is: 101.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.78 : 146.76 = 67.54 : x
  2. Step 2: Convert to fraction form
    97.78/146.76 = 67.54/x
  3. Step 3: Cross multiply
    97.78x = 146.76 × 67.54
  4. Step 4: Simplify right side
    97.78x = 9,912.17
  5. Step 5: Solve for x
    x = 9,912.17/97.78
  6. Step 6: Final answer
    x = 101.37

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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.