Home / 129,139.43-193,142.60-115,007.57

Finding the Fourth Proportional to 129,139.43, 193,142.60 and 115,007.57

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Solution

The fourth proportional to 129,139.43, 193,142.60 and 115,007.57 is: 172,006.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,139.43 : 193,142.60 = 115,007.57 : x
  2. Step 2: Convert to fraction form
    129,139.43/193,142.60 = 115,007.57/x
  3. Step 3: Cross multiply
    129,139.43x = 193,142.60 × 115,007.57
  4. Step 4: Simplify right side
    129,139.43x = 22,212,859,837.62
  5. Step 5: Solve for x
    x = 22,212,859,837.62/129,139.43
  6. Step 6: Final answer
    x = 172,006.79

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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.