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Finding the Fourth Proportional to 97.92, 134.91 and 93.60

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Solution

The fourth proportional to 97.92, 134.91 and 93.60 is: 128.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.92 : 134.91 = 93.60 : x
  2. Step 2: Convert to fraction form
    97.92/134.91 = 93.60/x
  3. Step 3: Cross multiply
    97.92x = 134.91 × 93.60
  4. Step 4: Simplify right side
    97.92x = 12,627.58
  5. Step 5: Solve for x
    x = 12,627.58/97.92
  6. Step 6: Final answer
    x = 128.96

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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.