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Finding the Fourth Proportional to 61,207.87, 91,812.21 and 16,839.31

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Solution

The fourth proportional to 61,207.87, 91,812.21 and 16,839.31 is: 25,259.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,207.87 : 91,812.21 = 16,839.31 : x
  2. Step 2: Convert to fraction form
    61,207.87/91,812.21 = 16,839.31/x
  3. Step 3: Cross multiply
    61,207.87x = 91,812.21 × 16,839.31
  4. Step 4: Simplify right side
    61,207.87x = 1,546,054,265.98
  5. Step 5: Solve for x
    x = 1,546,054,265.98/61,207.87
  6. Step 6: Final answer
    x = 25,259.08

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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.