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Finding the Fourth Proportional to 71.37, 98.44 and 54.97

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Solution

The fourth proportional to 71.37, 98.44 and 54.97 is: 75.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.37 : 98.44 = 54.97 : x
  2. Step 2: Convert to fraction form
    71.37/98.44 = 54.97/x
  3. Step 3: Cross multiply
    71.37x = 98.44 × 54.97
  4. Step 4: Simplify right side
    71.37x = 5,411.25
  5. Step 5: Solve for x
    x = 5,411.25/71.37
  6. Step 6: Final answer
    x = 75.82

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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.