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Finding the Fourth Proportional to 80,643,760.80, 120,965,641.24 and 80,643,760.80

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Solution

The fourth proportional to 80,643,760.80, 120,965,641.24 and 80,643,760.80 is: 120,965,641.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,643,760.80 : 120,965,641.24 = 80,643,760.80 : x
  2. Step 2: Convert to fraction form
    80,643,760.80/120,965,641.24 = 80,643,760.80/x
  3. Step 3: Cross multiply
    80,643,760.80x = 120,965,641.24 × 80,643,760.80
  4. Step 4: Simplify right side
    80,643,760.80x = 9,755,124,237,177,174
  5. Step 5: Solve for x
    x = 9,755,124,237,177,174/80,643,760.80
  6. Step 6: Final answer
    x = 120,965,641.24

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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.