Home / 128,738.43-192,160.71-119,713.41

Finding the Fourth Proportional to 128,738.43, 192,160.71 and 119,713.41

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Solution

The fourth proportional to 128,738.43, 192,160.71 and 119,713.41 is: 178,689.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,738.43 : 192,160.71 = 119,713.41 : x
  2. Step 2: Convert to fraction form
    128,738.43/192,160.71 = 119,713.41/x
  3. Step 3: Cross multiply
    128,738.43x = 192,160.71 × 119,713.41
  4. Step 4: Simplify right side
    128,738.43x = 23,004,213,862.12
  5. Step 5: Solve for x
    x = 23,004,213,862.12/128,738.43
  6. Step 6: Final answer
    x = 178,689.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.