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Finding the Fourth Proportional to 201,917.88, 278,636.70 and 117,062.52

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Solution

The fourth proportional to 201,917.88, 278,636.70 and 117,062.52 is: 161,540.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,917.88 : 278,636.70 = 117,062.52 : x
  2. Step 2: Convert to fraction form
    201,917.88/278,636.70 = 117,062.52/x
  3. Step 3: Cross multiply
    201,917.88x = 278,636.70 × 117,062.52
  4. Step 4: Simplify right side
    201,917.88x = 32,617,914,266.48
  5. Step 5: Solve for x
    x = 32,617,914,266.48/201,917.88
  6. Step 6: Final answer
    x = 161,540.49

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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.