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Finding the Fourth Proportional to 97.60, 134.64 and 66.54

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Solution

The fourth proportional to 97.60, 134.64 and 66.54 is: 91.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.60 : 134.64 = 66.54 : x
  2. Step 2: Convert to fraction form
    97.60/134.64 = 66.54/x
  3. Step 3: Cross multiply
    97.60x = 134.64 × 66.54
  4. Step 4: Simplify right side
    97.60x = 8,958.95
  5. Step 5: Solve for x
    x = 8,958.95/97.60
  6. Step 6: Final answer
    x = 91.79

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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.