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Finding the Fourth Proportional to 69.52, 103.60 and 64.66

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Solution

The fourth proportional to 69.52, 103.60 and 64.66 is: 96.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.52 : 103.60 = 64.66 : x
  2. Step 2: Convert to fraction form
    69.52/103.60 = 64.66/x
  3. Step 3: Cross multiply
    69.52x = 103.60 × 64.66
  4. Step 4: Simplify right side
    69.52x = 6,698.78
  5. Step 5: Solve for x
    x = 6,698.78/69.52
  6. Step 6: Final answer
    x = 96.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.