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Finding the Fourth Proportional to 91,910.61, 126,836.46 and 53,696.43

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Solution

The fourth proportional to 91,910.61, 126,836.46 and 53,696.43 is: 74,100.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,910.61 : 126,836.46 = 53,696.43 : x
  2. Step 2: Convert to fraction form
    91,910.61/126,836.46 = 53,696.43/x
  3. Step 3: Cross multiply
    91,910.61x = 126,836.46 × 53,696.43
  4. Step 4: Simplify right side
    91,910.61x = 6,810,665,095.84
  5. Step 5: Solve for x
    x = 6,810,665,095.84/91,910.61
  6. Step 6: Final answer
    x = 74,100.97

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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.