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Finding the Fourth Proportional to 266,797.20, 400,195.80 and 109,138.80

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Solution

The fourth proportional to 266,797.20, 400,195.80 and 109,138.80 is: 163,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,797.20 : 400,195.80 = 109,138.80 : x
  2. Step 2: Convert to fraction form
    266,797.20/400,195.80 = 109,138.80/x
  3. Step 3: Cross multiply
    266,797.20x = 400,195.80 × 109,138.80
  4. Step 4: Simplify right side
    266,797.20x = 43,676,889,377.04
  5. Step 5: Solve for x
    x = 43,676,889,377.04/266,797.20
  6. Step 6: Final answer
    x = 163,708.20

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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.