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Finding the Fourth Proportional to 129,813.70, 194,775.23 and 70,691.80

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Solution

The fourth proportional to 129,813.70, 194,775.23 and 70,691.80 is: 106,067.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,813.70 : 194,775.23 = 70,691.80 : x
  2. Step 2: Convert to fraction form
    129,813.70/194,775.23 = 70,691.80/x
  3. Step 3: Cross multiply
    129,813.70x = 194,775.23 × 70,691.80
  4. Step 4: Simplify right side
    129,813.70x = 13,769,011,604.11
  5. Step 5: Solve for x
    x = 13,769,011,604.11/129,813.70
  6. Step 6: Final answer
    x = 106,067.48

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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.