Home / 79,120.17-109,304.42-51,960.78

Finding the Fourth Proportional to 79,120.17, 109,304.42 and 51,960.78

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Solution

The fourth proportional to 79,120.17, 109,304.42 and 51,960.78 is: 71,783.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,120.17 : 109,304.42 = 51,960.78 : x
  2. Step 2: Convert to fraction form
    79,120.17/109,304.42 = 51,960.78/x
  3. Step 3: Cross multiply
    79,120.17x = 109,304.42 × 51,960.78
  4. Step 4: Simplify right side
    79,120.17x = 5,679,542,660.84
  5. Step 5: Solve for x
    x = 5,679,542,660.84/79,120.17
  6. Step 6: Final answer
    x = 71,783.75

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1.5x scale

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.