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Finding the Fourth Proportional to 69.33, 95.71 and 53.75

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Solution

The fourth proportional to 69.33, 95.71 and 53.75 is: 74.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.33 : 95.71 = 53.75 : x
  2. Step 2: Convert to fraction form
    69.33/95.71 = 53.75/x
  3. Step 3: Cross multiply
    69.33x = 95.71 × 53.75
  4. Step 4: Simplify right side
    69.33x = 5,144.66
  5. Step 5: Solve for x
    x = 5,144.66/69.33
  6. Step 6: Final answer
    x = 74.21

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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.