Home / 84,015,912.80-126,023,869.20-20,190,504.80

Finding the Fourth Proportional to 84,015,912.80, 126,023,869.20 and 20,190,504.80

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Solution

The fourth proportional to 84,015,912.80, 126,023,869.20 and 20,190,504.80 is: 30,285,757.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,015,912.80 : 126,023,869.20 = 20,190,504.80 : x
  2. Step 2: Convert to fraction form
    84,015,912.80/126,023,869.20 = 20,190,504.80/x
  3. Step 3: Cross multiply
    84,015,912.80x = 126,023,869.20 × 20,190,504.80
  4. Step 4: Simplify right side
    84,015,912.80x = 2,544,485,535,997,172.50
  5. Step 5: Solve for x
    x = 2,544,485,535,997,172.50/84,015,912.80
  6. Step 6: Final answer
    x = 30,285,757.20

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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.