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Finding the Fourth Proportional to 70.36, 104.32 and 69.73

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Solution

The fourth proportional to 70.36, 104.32 and 69.73 is: 103.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.36 : 104.32 = 69.73 : x
  2. Step 2: Convert to fraction form
    70.36/104.32 = 69.73/x
  3. Step 3: Cross multiply
    70.36x = 104.32 × 69.73
  4. Step 4: Simplify right side
    70.36x = 7,274.23
  5. Step 5: Solve for x
    x = 7,274.23/70.36
  6. Step 6: Final answer
    x = 103.39

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.