Home / 280,040,912.10-420,057,989.19-72,760,981.41

Finding the Fourth Proportional to 280,040,912.10, 420,057,989.19 and 72,760,981.41

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Solution

The fourth proportional to 280,040,912.10, 420,057,989.19 and 72,760,981.41 is: 109,140,594.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,040,912.10 : 420,057,989.19 = 72,760,981.41 : x
  2. Step 2: Convert to fraction form
    280,040,912.10/420,057,989.19 = 72,760,981.41/x
  3. Step 3: Cross multiply
    280,040,912.10x = 420,057,989.19 × 72,760,981.41
  4. Step 4: Simplify right side
    280,040,912.10x = 30,563,831,542,575,568
  5. Step 5: Solve for x
    x = 30,563,831,542,575,568/280,040,912.10
  6. Step 6: Final answer
    x = 109,140,594.18

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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.