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Finding the Fourth Proportional to 112,713.90, 168,948.81 and 73,299.30

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Solution

The fourth proportional to 112,713.90, 168,948.81 and 73,299.30 is: 109,869.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,713.90 : 168,948.81 = 73,299.30 : x
  2. Step 2: Convert to fraction form
    112,713.90/168,948.81 = 73,299.30/x
  3. Step 3: Cross multiply
    112,713.90x = 168,948.81 × 73,299.30
  4. Step 4: Simplify right side
    112,713.90x = 12,383,829,508.83
  5. Step 5: Solve for x
    x = 12,383,829,508.83/112,713.90
  6. Step 6: Final answer
    x = 109,869.59

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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.