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Finding the Fourth Proportional to 69.96, 104.34 and 65.40

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Solution

The fourth proportional to 69.96, 104.34 and 65.40 is: 97.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.96 : 104.34 = 65.40 : x
  2. Step 2: Convert to fraction form
    69.96/104.34 = 65.40/x
  3. Step 3: Cross multiply
    69.96x = 104.34 × 65.40
  4. Step 4: Simplify right side
    69.96x = 6,823.84
  5. Step 5: Solve for x
    x = 6,823.84/69.96
  6. Step 6: Final answer
    x = 97.54

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