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Finding the Fourth Proportional to 61,086.98, 91,644.81 and 18,964.91

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Solution

The fourth proportional to 61,086.98, 91,644.81 and 18,964.91 is: 28,451.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,086.98 : 91,644.81 = 18,964.91 : x
  2. Step 2: Convert to fraction form
    61,086.98/91,644.81 = 18,964.91/x
  3. Step 3: Cross multiply
    61,086.98x = 91,644.81 × 18,964.91
  4. Step 4: Simplify right side
    61,086.98x = 1,738,035,573.62
  5. Step 5: Solve for x
    x = 1,738,035,573.62/61,086.98
  6. Step 6: Final answer
    x = 28,451.82

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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.