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Finding the Fourth Proportional to 136,916.73, 205,128.45 and 128,682.27

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Solution

The fourth proportional to 136,916.73, 205,128.45 and 128,682.27 is: 192,791.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,916.73 : 205,128.45 = 128,682.27 : x
  2. Step 2: Convert to fraction form
    136,916.73/205,128.45 = 128,682.27/x
  3. Step 3: Cross multiply
    136,916.73x = 205,128.45 × 128,682.27
  4. Step 4: Simplify right side
    136,916.73x = 26,396,394,587.58
  5. Step 5: Solve for x
    x = 26,396,394,587.58/136,916.73
  6. Step 6: Final answer
    x = 192,791.59

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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.