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Finding the Fourth Proportional to 73,121.70, 109,609.65 and 33,609.90

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Solution

The fourth proportional to 73,121.70, 109,609.65 and 33,609.90 is: 50,381.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,121.70 : 109,609.65 = 33,609.90 : x
  2. Step 2: Convert to fraction form
    73,121.70/109,609.65 = 33,609.90/x
  3. Step 3: Cross multiply
    73,121.70x = 109,609.65 × 33,609.90
  4. Step 4: Simplify right side
    73,121.70x = 3,683,969,375.54
  5. Step 5: Solve for x
    x = 3,683,969,375.54/73,121.70
  6. Step 6: Final answer
    x = 50,381.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.