Home / 72,485,246.90-100,029,657.21-39,890,198.90

Finding the Fourth Proportional to 72,485,246.90, 100,029,657.21 and 39,890,198.90

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Solution

The fourth proportional to 72,485,246.90, 100,029,657.21 and 39,890,198.90 is: 55,048,483.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,485,246.90 : 100,029,657.21 = 39,890,198.90 : x
  2. Step 2: Convert to fraction form
    72,485,246.90/100,029,657.21 = 39,890,198.90/x
  3. Step 3: Cross multiply
    72,485,246.90x = 100,029,657.21 × 39,890,198.90
  4. Step 4: Simplify right side
    72,485,246.90x = 3,990,202,922,005,718.50
  5. Step 5: Solve for x
    x = 3,990,202,922,005,718.50/72,485,246.90
  6. Step 6: Final answer
    x = 55,048,483.56

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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.