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Finding the Fourth Proportional to 139,578.48, 209,241.03 and 50,769.21

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Solution

The fourth proportional to 139,578.48, 209,241.03 and 50,769.21 is: 76,107.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,578.48 : 209,241.03 = 50,769.21 : x
  2. Step 2: Convert to fraction form
    139,578.48/209,241.03 = 50,769.21/x
  3. Step 3: Cross multiply
    139,578.48x = 209,241.03 × 50,769.21
  4. Step 4: Simplify right side
    139,578.48x = 10,623,001,792.69
  5. Step 5: Solve for x
    x = 10,623,001,792.69/139,578.48
  6. Step 6: Final answer
    x = 76,107.73

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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.