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Finding the Fourth Proportional to 129,373.99, 194,049.86 and 78,759.88

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Solution

The fourth proportional to 129,373.99, 194,049.86 and 78,759.88 is: 118,133.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,373.99 : 194,049.86 = 78,759.88 : x
  2. Step 2: Convert to fraction form
    129,373.99/194,049.86 = 78,759.88/x
  3. Step 3: Cross multiply
    129,373.99x = 194,049.86 × 78,759.88
  4. Step 4: Simplify right side
    129,373.99x = 15,283,342,717.37
  5. Step 5: Solve for x
    x = 15,283,342,717.37/129,373.99
  6. Step 6: Final answer
    x = 118,133.04

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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.