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Finding the Fourth Proportional to 97.74, 134.60 and 75.87

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Solution

The fourth proportional to 97.74, 134.60 and 75.87 is: 104.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.74 : 134.60 = 75.87 : x
  2. Step 2: Convert to fraction form
    97.74/134.60 = 75.87/x
  3. Step 3: Cross multiply
    97.74x = 134.60 × 75.87
  4. Step 4: Simplify right side
    97.74x = 10,211.72
  5. Step 5: Solve for x
    x = 10,211.72/97.74
  6. Step 6: Final answer
    x = 104.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.