Home / 81,863,600.80-122,795,401.20-71,785,904.80

Finding the Fourth Proportional to 81,863,600.80, 122,795,401.20 and 71,785,904.80

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Solution

The fourth proportional to 81,863,600.80, 122,795,401.20 and 71,785,904.80 is: 107,678,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,863,600.80 : 122,795,401.20 = 71,785,904.80 : x
  2. Step 2: Convert to fraction form
    81,863,600.80/122,795,401.20 = 71,785,904.80/x
  3. Step 3: Cross multiply
    81,863,600.80x = 122,795,401.20 × 71,785,904.80
  4. Step 4: Simplify right side
    81,863,600.80x = 8,814,978,980,421,006
  5. Step 5: Solve for x
    x = 8,814,978,980,421,006/81,863,600.80
  6. Step 6: Final answer
    x = 107,678,857.20

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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.