Home / 72,485,220.77-100,029,620.99-39,890,172.77

Finding the Fourth Proportional to 72,485,220.77, 100,029,620.99 and 39,890,172.77

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Solution

The fourth proportional to 72,485,220.77, 100,029,620.99 and 39,890,172.77 is: 55,048,447.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,485,220.77 : 100,029,620.99 = 39,890,172.77 : x
  2. Step 2: Convert to fraction form
    72,485,220.77/100,029,620.99 = 39,890,172.77/x
  3. Step 3: Cross multiply
    72,485,220.77x = 100,029,620.99 × 39,890,172.77
  4. Step 4: Simplify right side
    72,485,220.77x = 3,990,198,863,383,407
  5. Step 5: Solve for x
    x = 3,990,198,863,383,407/72,485,220.77
  6. Step 6: Final answer
    x = 55,048,447.41

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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.