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Finding the Fourth Proportional to 141,252, 194,945.09 and 81,636

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Solution

The fourth proportional to 141,252, 194,945.09 and 81,636 is: 112,667.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,252 : 194,945.09 = 81,636 : x
  2. Step 2: Convert to fraction form
    141,252/194,945.09 = 81,636/x
  3. Step 3: Cross multiply
    141,252x = 194,945.09 × 81,636
  4. Step 4: Simplify right side
    141,252x = 15,914,536,959.06
  5. Step 5: Solve for x
    x = 15,914,536,959.06/141,252
  6. Step 6: Final answer
    x = 112,667.69

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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.