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Finding the Fourth Proportional to 79,891.20, 119,836.80 and 67,060.80

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Solution

The fourth proportional to 79,891.20, 119,836.80 and 67,060.80 is: 100,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,891.20 : 119,836.80 = 67,060.80 : x
  2. Step 2: Convert to fraction form
    79,891.20/119,836.80 = 67,060.80/x
  3. Step 3: Cross multiply
    79,891.20x = 119,836.80 × 67,060.80
  4. Step 4: Simplify right side
    79,891.20x = 8,036,351,677.44
  5. Step 5: Solve for x
    x = 8,036,351,677.44/79,891.20
  6. Step 6: Final answer
    x = 100,591.20

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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.