Home / 81,486,019.70-122,229,029.55-20,901,745.70

Finding the Fourth Proportional to 81,486,019.70, 122,229,029.55 and 20,901,745.70

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Solution

The fourth proportional to 81,486,019.70, 122,229,029.55 and 20,901,745.70 is: 31,352,618.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,486,019.70 : 122,229,029.55 = 20,901,745.70 : x
  2. Step 2: Convert to fraction form
    81,486,019.70/122,229,029.55 = 20,901,745.70/x
  3. Step 3: Cross multiply
    81,486,019.70x = 122,229,029.55 × 20,901,745.70
  4. Step 4: Simplify right side
    81,486,019.70x = 2,554,800,092,811,885.50
  5. Step 5: Solve for x
    x = 2,554,800,092,811,885.50/81,486,019.70
  6. Step 6: Final answer
    x = 31,352,618.55

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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.