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Finding the Fourth Proportional to 71.11, 97.98 and 54.49

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Solution

The fourth proportional to 71.11, 97.98 and 54.49 is: 75.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.11 : 97.98 = 54.49 : x
  2. Step 2: Convert to fraction form
    71.11/97.98 = 54.49/x
  3. Step 3: Cross multiply
    71.11x = 97.98 × 54.49
  4. Step 4: Simplify right side
    71.11x = 5,338.93
  5. Step 5: Solve for x
    x = 5,338.93/71.11
  6. Step 6: Final answer
    x = 75.08

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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.