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Finding the Fourth Proportional to 127,912.50, 176,588.46 and 76,936.61

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Solution

The fourth proportional to 127,912.50, 176,588.46 and 76,936.61 is: 106,214.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,912.50 : 176,588.46 = 76,936.61 : x
  2. Step 2: Convert to fraction form
    127,912.50/176,588.46 = 76,936.61/x
  3. Step 3: Cross multiply
    127,912.50x = 176,588.46 × 76,936.61
  4. Step 4: Simplify right side
    127,912.50x = 13,586,117,477.52
  5. Step 5: Solve for x
    x = 13,586,117,477.52/127,912.50
  6. Step 6: Final answer
    x = 106,214.15

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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.