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Finding the Fourth Proportional to 69.49, 95.38 and 64.01

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Solution

The fourth proportional to 69.49, 95.38 and 64.01 is: 87.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.49 : 95.38 = 64.01 : x
  2. Step 2: Convert to fraction form
    69.49/95.38 = 64.01/x
  3. Step 3: Cross multiply
    69.49x = 95.38 × 64.01
  4. Step 4: Simplify right side
    69.49x = 6,105.27
  5. Step 5: Solve for x
    x = 6,105.27/69.49
  6. Step 6: Final answer
    x = 87.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.