Home / 81,468,267.20-122,202,400.80-72,398,340.80

Finding the Fourth Proportional to 81,468,267.20, 122,202,400.80 and 72,398,340.80

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Solution

The fourth proportional to 81,468,267.20, 122,202,400.80 and 72,398,340.80 is: 108,597,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,468,267.20 : 122,202,400.80 = 72,398,340.80 : x
  2. Step 2: Convert to fraction form
    81,468,267.20/122,202,400.80 = 72,398,340.80/x
  3. Step 3: Cross multiply
    81,468,267.20x = 122,202,400.80 × 72,398,340.80
  4. Step 4: Simplify right side
    81,468,267.20x = 8,847,251,059,696,592
  5. Step 5: Solve for x
    x = 8,847,251,059,696,592/81,468,267.20
  6. Step 6: Final answer
    x = 108,597,511.20

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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.