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Finding the Fourth Proportional to 137,188.73, 206,811.34 and 128,044.33

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Solution

The fourth proportional to 137,188.73, 206,811.34 and 128,044.33 is: 193,026.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,188.73 : 206,811.34 = 128,044.33 : x
  2. Step 2: Convert to fraction form
    137,188.73/206,811.34 = 128,044.33/x
  3. Step 3: Cross multiply
    137,188.73x = 206,811.34 × 128,044.33
  4. Step 4: Simplify right side
    137,188.73x = 26,481,018,629.56
  5. Step 5: Solve for x
    x = 26,481,018,629.56/137,188.73
  6. Step 6: Final answer
    x = 193,026.20

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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.