Home / 81,004,077.20-121,506,115.80-20,419,803.20

Finding the Fourth Proportional to 81,004,077.20, 121,506,115.80 and 20,419,803.20

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Solution

The fourth proportional to 81,004,077.20, 121,506,115.80 and 20,419,803.20 is: 30,629,704.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,004,077.20 : 121,506,115.80 = 20,419,803.20 : x
  2. Step 2: Convert to fraction form
    81,004,077.20/121,506,115.80 = 20,419,803.20/x
  3. Step 3: Cross multiply
    81,004,077.20x = 121,506,115.80 × 20,419,803.20
  4. Step 4: Simplify right side
    81,004,077.20x = 2,481,130,972,232,410.50
  5. Step 5: Solve for x
    x = 2,481,130,972,232,410.50/81,004,077.20
  6. Step 6: Final answer
    x = 30,629,704.80

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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.