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Finding the Fourth Proportional to 136,728.96, 204,846.96 and 128,494.56

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Solution

The fourth proportional to 136,728.96, 204,846.96 and 128,494.56 is: 192,510.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,728.96 : 204,846.96 = 128,494.56 : x
  2. Step 2: Convert to fraction form
    136,728.96/204,846.96 = 128,494.56/x
  3. Step 3: Cross multiply
    136,728.96x = 204,846.96 × 128,494.56
  4. Step 4: Simplify right side
    136,728.96x = 26,321,719,992.54
  5. Step 5: Solve for x
    x = 26,321,719,992.54/136,728.96
  6. Step 6: Final answer
    x = 192,510.20

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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.