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Finding the Fourth Proportional to 137,186.38, 206,807.82 and 128,042

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Solution

The fourth proportional to 137,186.38, 206,807.82 and 128,042 is: 193,022.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,186.38 : 206,807.82 = 128,042 : x
  2. Step 2: Convert to fraction form
    137,186.38/206,807.82 = 128,042/x
  3. Step 3: Cross multiply
    137,186.38x = 206,807.82 × 128,042
  4. Step 4: Simplify right side
    137,186.38x = 26,480,086,888.44
  5. Step 5: Solve for x
    x = 26,480,086,888.44/137,186.38
  6. Step 6: Final answer
    x = 193,022.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.