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Finding the Fourth Proportional to 129,940.80, 194,765.40 and 73,807.80

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Solution

The fourth proportional to 129,940.80, 194,765.40 and 73,807.80 is: 110,628.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,940.80 : 194,765.40 = 73,807.80 : x
  2. Step 2: Convert to fraction form
    129,940.80/194,765.40 = 73,807.80/x
  3. Step 3: Cross multiply
    129,940.80x = 194,765.40 × 73,807.80
  4. Step 4: Simplify right side
    129,940.80x = 14,375,205,690.12
  5. Step 5: Solve for x
    x = 14,375,205,690.12/129,940.80
  6. Step 6: Final answer
    x = 110,628.88

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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.