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Finding the Fourth Proportional to 129,573.88, 193,921.91 and 79,685.62

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Solution

The fourth proportional to 129,573.88, 193,921.91 and 79,685.62 is: 119,258.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,573.88 : 193,921.91 = 79,685.62 : x
  2. Step 2: Convert to fraction form
    129,573.88/193,921.91 = 79,685.62/x
  3. Step 3: Cross multiply
    129,573.88x = 193,921.91 × 79,685.62
  4. Step 4: Simplify right side
    129,573.88x = 15,452,786,859.54
  5. Step 5: Solve for x
    x = 15,452,786,859.54/129,573.88
  6. Step 6: Final answer
    x = 119,258.51

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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.