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Finding the Fourth Proportional to 129,940.43, 194,923.40 and 54,023.28

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Solution

The fourth proportional to 129,940.43, 194,923.40 and 54,023.28 is: 81,040.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,940.43 : 194,923.40 = 54,023.28 : x
  2. Step 2: Convert to fraction form
    129,940.43/194,923.40 = 54,023.28/x
  3. Step 3: Cross multiply
    129,940.43x = 194,923.40 × 54,023.28
  4. Step 4: Simplify right side
    129,940.43x = 10,530,400,415.67
  5. Step 5: Solve for x
    x = 10,530,400,415.67/129,940.43
  6. Step 6: Final answer
    x = 81,040.22

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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.