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Finding the Fourth Proportional to 98,608.66, 135,793.29 and 85,682.50

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Solution

The fourth proportional to 98,608.66, 135,793.29 and 85,682.50 is: 117,992.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,608.66 : 135,793.29 = 85,682.50 : x
  2. Step 2: Convert to fraction form
    98,608.66/135,793.29 = 85,682.50/x
  3. Step 3: Cross multiply
    98,608.66x = 135,793.29 × 85,682.50
  4. Step 4: Simplify right side
    98,608.66x = 11,635,108,570.43
  5. Step 5: Solve for x
    x = 11,635,108,570.43/98,608.66
  6. Step 6: Final answer
    x = 117,992.77

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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.