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Finding the Fourth Proportional to 69.21, 95.36 and 63.32

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Solution

The fourth proportional to 69.21, 95.36 and 63.32 is: 87.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.21 : 95.36 = 63.32 : x
  2. Step 2: Convert to fraction form
    69.21/95.36 = 63.32/x
  3. Step 3: Cross multiply
    69.21x = 95.36 × 63.32
  4. Step 4: Simplify right side
    69.21x = 6,037.40
  5. Step 5: Solve for x
    x = 6,037.40/69.21
  6. Step 6: Final answer
    x = 87.23

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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.