Home / 91,940.16-137,831.22-31,960.78

Finding the Fourth Proportional to 91,940.16, 137,831.22 and 31,960.78

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Solution

The fourth proportional to 91,940.16, 137,831.22 and 31,960.78 is: 47,913.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,940.16 : 137,831.22 = 31,960.78 : x
  2. Step 2: Convert to fraction form
    91,940.16/137,831.22 = 31,960.78/x
  3. Step 3: Cross multiply
    91,940.16x = 137,831.22 × 31,960.78
  4. Step 4: Simplify right side
    91,940.16x = 4,405,192,954.97
  5. Step 5: Solve for x
    x = 4,405,192,954.97/91,940.16
  6. Step 6: Final answer
    x = 47,913.69

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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.