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Finding the Fourth Proportional to 81,649,884.60, 122,474,826.90 and 54,440,105.40

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Solution

The fourth proportional to 81,649,884.60, 122,474,826.90 and 54,440,105.40 is: 81,660,158.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649,884.60 : 122,474,826.90 = 54,440,105.40 : x
  2. Step 2: Convert to fraction form
    81,649,884.60/122,474,826.90 = 54,440,105.40/x
  3. Step 3: Cross multiply
    81,649,884.60x = 122,474,826.90 × 54,440,105.40
  4. Step 4: Simplify right side
    81,649,884.60x = 6,667,542,485,282,755
  5. Step 5: Solve for x
    x = 6,667,542,485,282,755/81,649,884.60
  6. Step 6: Final answer
    x = 81,660,158.10

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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.