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Finding the Fourth Proportional to 136,105.77, 187,836.48 and 81,659.99

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Solution

The fourth proportional to 136,105.77, 187,836.48 and 81,659.99 is: 112,697.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,105.77 : 187,836.48 = 81,659.99 : x
  2. Step 2: Convert to fraction form
    136,105.77/187,836.48 = 81,659.99/x
  3. Step 3: Cross multiply
    136,105.77x = 187,836.48 × 81,659.99
  4. Step 4: Simplify right side
    136,105.77x = 15,338,725,149.86
  5. Step 5: Solve for x
    x = 15,338,725,149.86/136,105.77
  6. Step 6: Final answer
    x = 112,697.10

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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.