Home / 2,129,990,520.86-2,939,678,917.92-1,225,727,871.68

Finding the Fourth Proportional to 2,129,990,520.86, 2,939,678,917.92 and 1,225,727,871.68

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Solution

The fourth proportional to 2,129,990,520.86, 2,939,678,917.92 and 1,225,727,871.68 is: 1,691,672,497.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129,990,520.86 : 2,939,678,917.92 = 1,225,727,871.68 : x
  2. Step 2: Convert to fraction form
    2,129,990,520.86/2,939,678,917.92 = 1,225,727,871.68/x
  3. Step 3: Cross multiply
    2,129,990,520.86x = 2,939,678,917.92 × 1,225,727,871.68
  4. Step 4: Simplify right side
    2,129,990,520.86x = 3,603,246,383,484,647,424
  5. Step 5: Solve for x
    x = 3,603,246,383,484,647,424/2,129,990,520.86
  6. Step 6: Final answer
    x = 1,691,672,497.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.