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Finding the Fourth Proportional to 100,949.25, 139,180.58 and 82,732.91

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Solution

The fourth proportional to 100,949.25, 139,180.58 and 82,732.91 is: 114,065.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,949.25 : 139,180.58 = 82,732.91 : x
  2. Step 2: Convert to fraction form
    100,949.25/139,180.58 = 82,732.91/x
  3. Step 3: Cross multiply
    100,949.25x = 139,180.58 × 82,732.91
  4. Step 4: Simplify right side
    100,949.25x = 11,514,814,333.17
  5. Step 5: Solve for x
    x = 11,514,814,333.17/100,949.25
  6. Step 6: Final answer
    x = 114,065.38

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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.