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Finding the Fourth Proportional to 69.96, 96.80 and 69.05

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Solution

The fourth proportional to 69.96, 96.80 and 69.05 is: 95.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.96 : 96.80 = 69.05 : x
  2. Step 2: Convert to fraction form
    69.96/96.80 = 69.05/x
  3. Step 3: Cross multiply
    69.96x = 96.80 × 69.05
  4. Step 4: Simplify right side
    69.96x = 6,683.94
  5. Step 5: Solve for x
    x = 6,683.94/69.96
  6. Step 6: Final answer
    x = 95.53

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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.