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Finding the Fourth Proportional to 170,987.90, 256,481.85 and 92,255.90

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Solution

The fourth proportional to 170,987.90, 256,481.85 and 92,255.90 is: 138,383.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,987.90 : 256,481.85 = 92,255.90 : x
  2. Step 2: Convert to fraction form
    170,987.90/256,481.85 = 92,255.90/x
  3. Step 3: Cross multiply
    170,987.90x = 256,481.85 × 92,255.90
  4. Step 4: Simplify right side
    170,987.90x = 23,661,963,905.42
  5. Step 5: Solve for x
    x = 23,661,963,905.42/170,987.90
  6. Step 6: Final answer
    x = 138,383.85

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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.