Home / 129,139.20-193,142.19-115,007.33

Finding the Fourth Proportional to 129,139.20, 193,142.19 and 115,007.33

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Solution

The fourth proportional to 129,139.20, 193,142.19 and 115,007.33 is: 172,006.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,139.20 : 193,142.19 = 115,007.33 : x
  2. Step 2: Convert to fraction form
    129,139.20/193,142.19 = 115,007.33/x
  3. Step 3: Cross multiply
    129,139.20x = 193,142.19 × 115,007.33
  4. Step 4: Simplify right side
    129,139.20x = 22,212,766,616.54
  5. Step 5: Solve for x
    x = 22,212,766,616.54/129,139.20
  6. Step 6: Final answer
    x = 172,006.38

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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.