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Finding the Fourth Proportional to 192,707.30, 288,672.15 and 129,721.70

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Solution

The fourth proportional to 192,707.30, 288,672.15 and 129,721.70 is: 194,320.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,707.30 : 288,672.15 = 129,721.70 : x
  2. Step 2: Convert to fraction form
    192,707.30/288,672.15 = 129,721.70/x
  3. Step 3: Cross multiply
    192,707.30x = 288,672.15 × 129,721.70
  4. Step 4: Simplify right side
    192,707.30x = 37,447,042,040.66
  5. Step 5: Solve for x
    x = 37,447,042,040.66/192,707.30
  6. Step 6: Final answer
    x = 194,320.83

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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.