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Finding the Fourth Proportional to 185,763.90, 278,638.29 and 85,891.26

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Solution

The fourth proportional to 185,763.90, 278,638.29 and 85,891.26 is: 128,833.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,763.90 : 278,638.29 = 85,891.26 : x
  2. Step 2: Convert to fraction form
    185,763.90/278,638.29 = 85,891.26/x
  3. Step 3: Cross multiply
    185,763.90x = 278,638.29 × 85,891.26
  4. Step 4: Simplify right side
    185,763.90x = 23,932,593,812.35
  5. Step 5: Solve for x
    x = 23,932,593,812.35/185,763.90
  6. Step 6: Final answer
    x = 128,833.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.