Home / 279,839.10-419,634.81-80,113.98

Finding the Fourth Proportional to 279,839.10, 419,634.81 and 80,113.98

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Solution

The fourth proportional to 279,839.10, 419,634.81 and 80,113.98 is: 120,135.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,839.10 : 419,634.81 = 80,113.98 : x
  2. Step 2: Convert to fraction form
    279,839.10/419,634.81 = 80,113.98/x
  3. Step 3: Cross multiply
    279,839.10x = 419,634.81 × 80,113.98
  4. Step 4: Simplify right side
    279,839.10x = 33,618,614,775.64
  5. Step 5: Solve for x
    x = 33,618,614,775.64/279,839.10
  6. Step 6: Final answer
    x = 120,135.52

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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.