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Finding the Fourth Proportional to 61,290.80, 91,887.60 and 33,588.80

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Solution

The fourth proportional to 61,290.80, 91,887.60 and 33,588.80 is: 50,356.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,290.80 : 91,887.60 = 33,588.80 : x
  2. Step 2: Convert to fraction form
    61,290.80/91,887.60 = 33,588.80/x
  3. Step 3: Cross multiply
    61,290.80x = 91,887.60 × 33,588.80
  4. Step 4: Simplify right side
    61,290.80x = 3,086,394,218.88
  5. Step 5: Solve for x
    x = 3,086,394,218.88/61,290.80
  6. Step 6: Final answer
    x = 50,356.57

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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.