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Finding the Fourth Proportional to 129,776.88, 194,571.86 and 79,753.64

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Solution

The fourth proportional to 129,776.88, 194,571.86 and 79,753.64 is: 119,573.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,776.88 : 194,571.86 = 79,753.64 : x
  2. Step 2: Convert to fraction form
    129,776.88/194,571.86 = 79,753.64/x
  3. Step 3: Cross multiply
    129,776.88x = 194,571.86 × 79,753.64
  4. Step 4: Simplify right side
    129,776.88x = 15,517,814,076.57
  5. Step 5: Solve for x
    x = 15,517,814,076.57/129,776.88
  6. Step 6: Final answer
    x = 119,573.02

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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.