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Finding the Fourth Proportional to 69.96, 104.28 and 64.08

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Solution

The fourth proportional to 69.96, 104.28 and 64.08 is: 95.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.96 : 104.28 = 64.08 : x
  2. Step 2: Convert to fraction form
    69.96/104.28 = 64.08/x
  3. Step 3: Cross multiply
    69.96x = 104.28 × 64.08
  4. Step 4: Simplify right side
    69.96x = 6,682.26
  5. Step 5: Solve for x
    x = 6,682.26/69.96
  6. Step 6: Final answer
    x = 95.52

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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.