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Finding the Fourth Proportional to 138,998.23, 206,709.17 and 134,569.55

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Solution

The fourth proportional to 138,998.23, 206,709.17 and 134,569.55 is: 200,123.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,998.23 : 206,709.17 = 134,569.55 : x
  2. Step 2: Convert to fraction form
    138,998.23/206,709.17 = 134,569.55/x
  3. Step 3: Cross multiply
    138,998.23x = 206,709.17 × 134,569.55
  4. Step 4: Simplify right side
    138,998.23x = 27,816,759,831.70
  5. Step 5: Solve for x
    x = 27,816,759,831.70/138,998.23
  6. Step 6: Final answer
    x = 200,123.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.