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Finding the Fourth Proportional to 266,698.80, 400,105.80 and 79,729.20

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Solution

The fourth proportional to 266,698.80, 400,105.80 and 79,729.20 is: 119,611.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,698.80 : 400,105.80 = 79,729.20 : x
  2. Step 2: Convert to fraction form
    266,698.80/400,105.80 = 79,729.20/x
  3. Step 3: Cross multiply
    266,698.80x = 400,105.80 × 79,729.20
  4. Step 4: Simplify right side
    266,698.80x = 31,900,115,349.36
  5. Step 5: Solve for x
    x = 31,900,115,349.36/266,698.80
  6. Step 6: Final answer
    x = 119,611.02

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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.