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Finding the Fourth Proportional to 99,201.75, 136,898.73 and 58,917.21

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Solution

The fourth proportional to 99,201.75, 136,898.73 and 58,917.21 is: 81,305.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,201.75 : 136,898.73 = 58,917.21 : x
  2. Step 2: Convert to fraction form
    99,201.75/136,898.73 = 58,917.21/x
  3. Step 3: Cross multiply
    99,201.75x = 136,898.73 × 58,917.21
  4. Step 4: Simplify right side
    99,201.75x = 8,065,691,224.14
  5. Step 5: Solve for x
    x = 8,065,691,224.14/99,201.75
  6. Step 6: Final answer
    x = 81,305.94

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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.