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Finding the Fourth Proportional to 71.26, 98.49 and 54.88

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Solution

The fourth proportional to 71.26, 98.49 and 54.88 is: 75.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.26 : 98.49 = 54.88 : x
  2. Step 2: Convert to fraction form
    71.26/98.49 = 54.88/x
  3. Step 3: Cross multiply
    71.26x = 98.49 × 54.88
  4. Step 4: Simplify right side
    71.26x = 5,405.13
  5. Step 5: Solve for x
    x = 5,405.13/71.26
  6. Step 6: Final answer
    x = 75.85

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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.