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Finding the Fourth Proportional to 64.82, 97.11 and 54.02

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Solution

The fourth proportional to 64.82, 97.11 and 54.02 is: 80.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.82 : 97.11 = 54.02 : x
  2. Step 2: Convert to fraction form
    64.82/97.11 = 54.02/x
  3. Step 3: Cross multiply
    64.82x = 97.11 × 54.02
  4. Step 4: Simplify right side
    64.82x = 5,245.40
  5. Step 5: Solve for x
    x = 5,245.40/64.82
  6. Step 6: Final answer
    x = 80.93

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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.