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Finding the Fourth Proportional to 80,930,418.80, 121,395,628.20 and 80,930,418.80

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Solution

The fourth proportional to 80,930,418.80, 121,395,628.20 and 80,930,418.80 is: 121,395,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,930,418.80 : 121,395,628.20 = 80,930,418.80 : x
  2. Step 2: Convert to fraction form
    80,930,418.80/121,395,628.20 = 80,930,418.80/x
  3. Step 3: Cross multiply
    80,930,418.80x = 121,395,628.20 × 80,930,418.80
  4. Step 4: Simplify right side
    80,930,418.80x = 9,824,599,030,715,090
  5. Step 5: Solve for x
    x = 9,824,599,030,715,090/80,930,418.80
  6. Step 6: Final answer
    x = 121,395,628.20

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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.