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Finding the Fourth Proportional to 279,701.40, 419,697.90 and 121,945.80

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Solution

The fourth proportional to 279,701.40, 419,697.90 and 121,945.80 is: 182,982.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,701.40 : 419,697.90 = 121,945.80 : x
  2. Step 2: Convert to fraction form
    279,701.40/419,697.90 = 121,945.80/x
  3. Step 3: Cross multiply
    279,701.40x = 419,697.90 × 121,945.80
  4. Step 4: Simplify right side
    279,701.40x = 51,180,396,173.82
  5. Step 5: Solve for x
    x = 51,180,396,173.82/279,701.40
  6. Step 6: Final answer
    x = 182,982.27

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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.