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Finding the Fourth Proportional to 100,996.92, 139,465.46 and 62,821.88

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Solution

The fourth proportional to 100,996.92, 139,465.46 and 62,821.88 is: 86,750.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,996.92 : 139,465.46 = 62,821.88 : x
  2. Step 2: Convert to fraction form
    100,996.92/139,465.46 = 62,821.88/x
  3. Step 3: Cross multiply
    100,996.92x = 139,465.46 × 62,821.88
  4. Step 4: Simplify right side
    100,996.92x = 8,761,482,392.26
  5. Step 5: Solve for x
    x = 8,761,482,392.26/100,996.92
  6. Step 6: Final answer
    x = 86,750.00

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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.