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Finding the Fourth Proportional to 107,930.50, 148,944.10 and 63,218.50

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Solution

The fourth proportional to 107,930.50, 148,944.10 and 63,218.50 is: 87,241.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,930.50 : 148,944.10 = 63,218.50 : x
  2. Step 2: Convert to fraction form
    107,930.50/148,944.10 = 63,218.50/x
  3. Step 3: Cross multiply
    107,930.50x = 148,944.10 × 63,218.50
  4. Step 4: Simplify right side
    107,930.50x = 9,416,022,585.85
  5. Step 5: Solve for x
    x = 9,416,022,585.85/107,930.50
  6. Step 6: Final answer
    x = 87,241.54

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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.