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Finding the Fourth Proportional to 136,273.80, 204,021.90 and 120,721.80

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Solution

The fourth proportional to 136,273.80, 204,021.90 and 120,721.80 is: 180,738.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,273.80 : 204,021.90 = 120,721.80 : x
  2. Step 2: Convert to fraction form
    136,273.80/204,021.90 = 120,721.80/x
  3. Step 3: Cross multiply
    136,273.80x = 204,021.90 × 120,721.80
  4. Step 4: Simplify right side
    136,273.80x = 24,629,891,007.42
  5. Step 5: Solve for x
    x = 24,629,891,007.42/136,273.80
  6. Step 6: Final answer
    x = 180,738.27

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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.