Home / 80,288,634.80-120,972,694.46-72,620,828.24

Finding the Fourth Proportional to 80,288,634.80, 120,972,694.46 and 72,620,828.24

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Solution

The fourth proportional to 80,288,634.80, 120,972,694.46 and 72,620,828.24 is: 109,419,437.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,288,634.80 : 120,972,694.46 = 72,620,828.24 : x
  2. Step 2: Convert to fraction form
    80,288,634.80/120,972,694.46 = 72,620,828.24/x
  3. Step 3: Cross multiply
    80,288,634.80x = 120,972,694.46 × 72,620,828.24
  4. Step 4: Simplify right side
    80,288,634.80x = 8,785,137,266,109,658
  5. Step 5: Solve for x
    x = 8,785,137,266,109,658/80,288,634.80
  6. Step 6: Final answer
    x = 109,419,437.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.