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Finding the Fourth Proportional to 55,791.99, 76,989.29 and 33,129.81

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Solution

The fourth proportional to 55,791.99, 76,989.29 and 33,129.81 is: 45,716.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,791.99 : 76,989.29 = 33,129.81 : x
  2. Step 2: Convert to fraction form
    55,791.99/76,989.29 = 33,129.81/x
  3. Step 3: Cross multiply
    55,791.99x = 76,989.29 × 33,129.81
  4. Step 4: Simplify right side
    55,791.99x = 2,550,640,384.09
  5. Step 5: Solve for x
    x = 2,550,640,384.09/55,791.99
  6. Step 6: Final answer
    x = 45,716.96

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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.