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Finding the Fourth Proportional to 125,877.92, 188,761.46 and 66,699.94

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Solution

The fourth proportional to 125,877.92, 188,761.46 and 66,699.94 is: 100,020.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,877.92 : 188,761.46 = 66,699.94 : x
  2. Step 2: Convert to fraction form
    125,877.92/188,761.46 = 66,699.94/x
  3. Step 3: Cross multiply
    125,877.92x = 188,761.46 × 66,699.94
  4. Step 4: Simplify right side
    125,877.92x = 12,590,378,056.31
  5. Step 5: Solve for x
    x = 12,590,378,056.31/125,877.92
  6. Step 6: Final answer
    x = 100,020.54

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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.