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Finding the Fourth Proportional to 61,086.81, 91,625.88 and 18,965.88

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Solution

The fourth proportional to 61,086.81, 91,625.88 and 18,965.88 is: 28,447.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,086.81 : 91,625.88 = 18,965.88 : x
  2. Step 2: Convert to fraction form
    61,086.81/91,625.88 = 18,965.88/x
  3. Step 3: Cross multiply
    61,086.81x = 91,625.88 × 18,965.88
  4. Step 4: Simplify right side
    61,086.81x = 1,737,765,444.97
  5. Step 5: Solve for x
    x = 1,737,765,444.97/61,086.81
  6. Step 6: Final answer
    x = 28,447.47

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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.