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Finding the Fourth Proportional to 71,693.54, 98,935.05 and 39,861.86

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Solution

The fourth proportional to 71,693.54, 98,935.05 and 39,861.86 is: 55,008.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,693.54 : 98,935.05 = 39,861.86 : x
  2. Step 2: Convert to fraction form
    71,693.54/98,935.05 = 39,861.86/x
  3. Step 3: Cross multiply
    71,693.54x = 98,935.05 × 39,861.86
  4. Step 4: Simplify right side
    71,693.54x = 3,943,735,112.19
  5. Step 5: Solve for x
    x = 3,943,735,112.19/71,693.54
  6. Step 6: Final answer
    x = 55,008.24

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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.