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Finding the Fourth Proportional to 69.25, 95.40 and 66.01

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Solution

The fourth proportional to 69.25, 95.40 and 66.01 is: 90.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.25 : 95.40 = 66.01 : x
  2. Step 2: Convert to fraction form
    69.25/95.40 = 66.01/x
  3. Step 3: Cross multiply
    69.25x = 95.40 × 66.01
  4. Step 4: Simplify right side
    69.25x = 6,297.35
  5. Step 5: Solve for x
    x = 6,297.35/69.25
  6. Step 6: Final answer
    x = 90.94

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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.