Home / 72,769,140.45-100,420,893.91-39,729,388.56

Finding the Fourth Proportional to 72,769,140.45, 100,420,893.91 and 39,729,388.56

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Solution

The fourth proportional to 72,769,140.45, 100,420,893.91 and 39,729,388.56 is: 54,826,272.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,769,140.45 : 100,420,893.91 = 39,729,388.56 : x
  2. Step 2: Convert to fraction form
    72,769,140.45/100,420,893.91 = 39,729,388.56/x
  3. Step 3: Cross multiply
    72,769,140.45x = 100,420,893.91 × 39,729,388.56
  4. Step 4: Simplify right side
    72,769,140.45x = 3,989,660,713,593,604.50
  5. Step 5: Solve for x
    x = 3,989,660,713,593,604.50/72,769,140.45
  6. Step 6: Final answer
    x = 54,826,272.36

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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.