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Finding the Fourth Proportional to 78,317.63, 117,518.97 and 33,331.65

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Solution

The fourth proportional to 78,317.63, 117,518.97 and 33,331.65 is: 50,015.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,317.63 : 117,518.97 = 33,331.65 : x
  2. Step 2: Convert to fraction form
    78,317.63/117,518.97 = 33,331.65/x
  3. Step 3: Cross multiply
    78,317.63x = 117,518.97 × 33,331.65
  4. Step 4: Simplify right side
    78,317.63x = 3,917,101,259.73
  5. Step 5: Solve for x
    x = 3,917,101,259.73/78,317.63
  6. Step 6: Final answer
    x = 50,015.57

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.