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Finding the Fourth Proportional to 266,721.60, 400,309.20 and 109,063.20

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Solution

The fourth proportional to 266,721.60, 400,309.20 and 109,063.20 is: 163,687.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,721.60 : 400,309.20 = 109,063.20 : x
  2. Step 2: Convert to fraction form
    266,721.60/400,309.20 = 109,063.20/x
  3. Step 3: Cross multiply
    266,721.60x = 400,309.20 × 109,063.20
  4. Step 4: Simplify right side
    266,721.60x = 43,659,002,341.44
  5. Step 5: Solve for x
    x = 43,659,002,341.44/266,721.60
  6. Step 6: Final answer
    x = 163,687.54

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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.