Home / 81,682,709.60-122,524,064.40-81,204,412.70

Finding the Fourth Proportional to 81,682,709.60, 122,524,064.40 and 81,204,412.70

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Solution

The fourth proportional to 81,682,709.60, 122,524,064.40 and 81,204,412.70 is: 121,806,619.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,682,709.60 : 122,524,064.40 = 81,204,412.70 : x
  2. Step 2: Convert to fraction form
    81,682,709.60/122,524,064.40 = 81,204,412.70/x
  3. Step 3: Cross multiply
    81,682,709.60x = 122,524,064.40 × 81,204,412.70
  4. Step 4: Simplify right side
    81,682,709.60x = 9,949,494,691,218,978
  5. Step 5: Solve for x
    x = 9,949,494,691,218,978/81,682,709.60
  6. Step 6: Final answer
    x = 121,806,619.05

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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.