Home / 279,415.68-419,205.18-89,871.78

Finding the Fourth Proportional to 279,415.68, 419,205.18 and 89,871.78

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Solution

The fourth proportional to 279,415.68, 419,205.18 and 89,871.78 is: 134,833.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,415.68 : 419,205.18 = 89,871.78 : x
  2. Step 2: Convert to fraction form
    279,415.68/419,205.18 = 89,871.78/x
  3. Step 3: Cross multiply
    279,415.68x = 419,205.18 × 89,871.78
  4. Step 4: Simplify right side
    279,415.68x = 37,674,715,711.82
  5. Step 5: Solve for x
    x = 37,674,715,711.82/279,415.68
  6. Step 6: Final answer
    x = 134,833.94

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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.