Home / 129,110.73-178,145.17-75,371.36

Finding the Fourth Proportional to 129,110.73, 178,145.17 and 75,371.36

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Solution

The fourth proportional to 129,110.73, 178,145.17 and 75,371.36 is: 103,996.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,110.73 : 178,145.17 = 75,371.36 : x
  2. Step 2: Convert to fraction form
    129,110.73/178,145.17 = 75,371.36/x
  3. Step 3: Cross multiply
    129,110.73x = 178,145.17 × 75,371.36
  4. Step 4: Simplify right side
    129,110.73x = 13,427,042,472.75
  5. Step 5: Solve for x
    x = 13,427,042,472.75/129,110.73
  6. Step 6: Final answer
    x = 103,996.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.