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Finding the Fourth Proportional to 139,593.84, 192,541.92 and 91,831.92

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Solution

The fourth proportional to 139,593.84, 192,541.92 and 91,831.92 is: 126,663.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,593.84 : 192,541.92 = 91,831.92 : x
  2. Step 2: Convert to fraction form
    139,593.84/192,541.92 = 91,831.92/x
  3. Step 3: Cross multiply
    139,593.84x = 192,541.92 × 91,831.92
  4. Step 4: Simplify right side
    139,593.84x = 17,681,494,194.09
  5. Step 5: Solve for x
    x = 17,681,494,194.09/139,593.84
  6. Step 6: Final answer
    x = 126,663.86

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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.