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Finding the Fourth Proportional to 192,079.20, 287,859.60 and 136,610.40

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Solution

The fourth proportional to 192,079.20, 287,859.60 and 136,610.40 is: 204,731.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,079.20 : 287,859.60 = 136,610.40 : x
  2. Step 2: Convert to fraction form
    192,079.20/287,859.60 = 136,610.40/x
  3. Step 3: Cross multiply
    192,079.20x = 287,859.60 × 136,610.40
  4. Step 4: Simplify right side
    192,079.20x = 39,324,615,099.84
  5. Step 5: Solve for x
    x = 39,324,615,099.84/192,079.20
  6. Step 6: Final answer
    x = 204,731.25

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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.