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Finding the Fourth Proportional to 77,893.11, 116,839.67 and 18,728.79

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Solution

The fourth proportional to 77,893.11, 116,839.67 and 18,728.79 is: 28,093.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,893.11 : 116,839.67 = 18,728.79 : x
  2. Step 2: Convert to fraction form
    77,893.11/116,839.67 = 18,728.79/x
  3. Step 3: Cross multiply
    77,893.11x = 116,839.67 × 18,728.79
  4. Step 4: Simplify right side
    77,893.11x = 2,188,265,643.10
  5. Step 5: Solve for x
    x = 2,188,265,643.10/77,893.11
  6. Step 6: Final answer
    x = 28,093.19

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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.