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Finding the Fourth Proportional to 76,691,375.57, 105,836,709.70 and 45,356,285.61

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Solution

The fourth proportional to 76,691,375.57, 105,836,709.70 and 45,356,285.61 is: 62,593,218.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,691,375.57 : 105,836,709.70 = 45,356,285.61 : x
  2. Step 2: Convert to fraction form
    76,691,375.57/105,836,709.70 = 45,356,285.61/x
  3. Step 3: Cross multiply
    76,691,375.57x = 105,836,709.70 × 45,356,285.61
  4. Step 4: Simplify right side
    76,691,375.57x = 4,800,360,032,977,650
  5. Step 5: Solve for x
    x = 4,800,360,032,977,650/76,691,375.57
  6. Step 6: Final answer
    x = 62,593,218.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.