Home / 81,004,069.20-121,506,103.80-20,419,795.20

Finding the Fourth Proportional to 81,004,069.20, 121,506,103.80 and 20,419,795.20

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Solution

The fourth proportional to 81,004,069.20, 121,506,103.80 and 20,419,795.20 is: 30,629,692.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,004,069.20 : 121,506,103.80 = 20,419,795.20 : x
  2. Step 2: Convert to fraction form
    81,004,069.20/121,506,103.80 = 20,419,795.20/x
  3. Step 3: Cross multiply
    81,004,069.20x = 121,506,103.80 × 20,419,795.20
  4. Step 4: Simplify right side
    81,004,069.20x = 2,481,129,755,145,941.50
  5. Step 5: Solve for x
    x = 2,481,129,755,145,941.50/81,004,069.20
  6. Step 6: Final answer
    x = 30,629,692.80

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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.