Home / 142,604.28-196,791.51-78,940.71

Finding the Fourth Proportional to 142,604.28, 196,791.51 and 78,940.71

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Solution

The fourth proportional to 142,604.28, 196,791.51 and 78,940.71 is: 108,936.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,604.28 : 196,791.51 = 78,940.71 : x
  2. Step 2: Convert to fraction form
    142,604.28/196,791.51 = 78,940.71/x
  3. Step 3: Cross multiply
    142,604.28x = 196,791.51 × 78,940.71
  4. Step 4: Simplify right side
    142,604.28x = 15,534,861,521.37
  5. Step 5: Solve for x
    x = 15,534,861,521.37/142,604.28
  6. Step 6: Final answer
    x = 108,936.85

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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.