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Finding the Fourth Proportional to 128,757,949.60, 192,633,039.60 and 83,408,317.60

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Solution

The fourth proportional to 128,757,949.60, 192,633,039.60 and 83,408,317.60 is: 124,786,064.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,757,949.60 : 192,633,039.60 = 83,408,317.60 : x
  2. Step 2: Convert to fraction form
    128,757,949.60/192,633,039.60 = 83,408,317.60/x
  3. Step 3: Cross multiply
    128,757,949.60x = 192,633,039.60 × 83,408,317.60
  4. Step 4: Simplify right side
    128,757,949.60x = 16,067,197,747,210,176
  5. Step 5: Solve for x
    x = 16,067,197,747,210,176/128,757,949.60
  6. Step 6: Final answer
    x = 124,786,064.06

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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.