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Finding the Fourth Proportional to 69.49, 95.88 and 54.91

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Solution

The fourth proportional to 69.49, 95.88 and 54.91 is: 75.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.49 : 95.88 = 54.91 : x
  2. Step 2: Convert to fraction form
    69.49/95.88 = 54.91/x
  3. Step 3: Cross multiply
    69.49x = 95.88 × 54.91
  4. Step 4: Simplify right side
    69.49x = 5,264.77
  5. Step 5: Solve for x
    x = 5,264.77/69.49
  6. Step 6: Final answer
    x = 75.76

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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.