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Finding the Fourth Proportional to 129,872.70, 194,809.05 and 100,348.20

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Solution

The fourth proportional to 129,872.70, 194,809.05 and 100,348.20 is: 150,522.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,872.70 : 194,809.05 = 100,348.20 : x
  2. Step 2: Convert to fraction form
    129,872.70/194,809.05 = 100,348.20/x
  3. Step 3: Cross multiply
    129,872.70x = 194,809.05 × 100,348.20
  4. Step 4: Simplify right side
    129,872.70x = 19,548,737,511.21
  5. Step 5: Solve for x
    x = 19,548,737,511.21/129,872.70
  6. Step 6: Final answer
    x = 150,522.30

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1.5x scale

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.