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Finding the Fourth Proportional to 279,901.46, 419,917.80 and 92,912.96

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Solution

The fourth proportional to 279,901.46, 419,917.80 and 92,912.96 is: 139,391.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,901.46 : 419,917.80 = 92,912.96 : x
  2. Step 2: Convert to fraction form
    279,901.46/419,917.80 = 92,912.96/x
  3. Step 3: Cross multiply
    279,901.46x = 419,917.80 × 92,912.96
  4. Step 4: Simplify right side
    279,901.46x = 39,015,805,754.69
  5. Step 5: Solve for x
    x = 39,015,805,754.69/279,901.46
  6. Step 6: Final answer
    x = 139,391.22

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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.