Home / 85,335,517.62-128,003,338.71-20,639,385

Finding the Fourth Proportional to 85,335,517.62, 128,003,338.71 and 20,639,385

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Solution

The fourth proportional to 85,335,517.62, 128,003,338.71 and 20,639,385 is: 30,959,092.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,335,517.62 : 128,003,338.71 = 20,639,385 : x
  2. Step 2: Convert to fraction form
    85,335,517.62/128,003,338.71 = 20,639,385/x
  3. Step 3: Cross multiply
    85,335,517.62x = 128,003,338.71 × 20,639,385
  4. Step 4: Simplify right side
    85,335,517.62x = 2,641,910,188,921,093
  5. Step 5: Solve for x
    x = 2,641,910,188,921,093/85,335,517.62
  6. Step 6: Final answer
    x = 30,959,092.56

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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.