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Finding the Fourth Proportional to 58,889.62, 81,297.71 and 39,869.91

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Solution

The fourth proportional to 58,889.62, 81,297.71 and 39,869.91 is: 55,040.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,889.62 : 81,297.71 = 39,869.91 : x
  2. Step 2: Convert to fraction form
    58,889.62/81,297.71 = 39,869.91/x
  3. Step 3: Cross multiply
    58,889.62x = 81,297.71 × 39,869.91
  4. Step 4: Simplify right side
    58,889.62x = 3,241,332,380.91
  5. Step 5: Solve for x
    x = 3,241,332,380.91/58,889.62
  6. Step 6: Final answer
    x = 55,040.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.