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Finding the Fourth Proportional to 136,809.63, 188,800.47 and 85,824.54

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Solution

The fourth proportional to 136,809.63, 188,800.47 and 85,824.54 is: 118,439.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,809.63 : 188,800.47 = 85,824.54 : x
  2. Step 2: Convert to fraction form
    136,809.63/188,800.47 = 85,824.54/x
  3. Step 3: Cross multiply
    136,809.63x = 188,800.47 × 85,824.54
  4. Step 4: Simplify right side
    136,809.63x = 16,203,713,489.53
  5. Step 5: Solve for x
    x = 16,203,713,489.53/136,809.63
  6. Step 6: Final answer
    x = 118,439.86

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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.