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Finding the Fourth Proportional to 279,859.35, 419,877.81 and 99,940.86

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Solution

The fourth proportional to 279,859.35, 419,877.81 and 99,940.86 is: 149,943.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,859.35 : 419,877.81 = 99,940.86 : x
  2. Step 2: Convert to fraction form
    279,859.35/419,877.81 = 99,940.86/x
  3. Step 3: Cross multiply
    279,859.35x = 419,877.81 × 99,940.86
  4. Step 4: Simplify right side
    279,859.35x = 41,962,949,426.32
  5. Step 5: Solve for x
    x = 41,962,949,426.32/279,859.35
  6. Step 6: Final answer
    x = 149,943.00

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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.