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Finding the Fourth Proportional to 135,536.78, 186,979.42 and 81,804.62

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Solution

The fourth proportional to 135,536.78, 186,979.42 and 81,804.62 is: 112,853.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,536.78 : 186,979.42 = 81,804.62 : x
  2. Step 2: Convert to fraction form
    135,536.78/186,979.42 = 81,804.62/x
  3. Step 3: Cross multiply
    135,536.78x = 186,979.42 × 81,804.62
  4. Step 4: Simplify right side
    135,536.78x = 15,295,780,850.11
  5. Step 5: Solve for x
    x = 15,295,780,850.11/135,536.78
  6. Step 6: Final answer
    x = 112,853.36

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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.