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Finding the Fourth Proportional to 266,069.20, 399,103.80 and 79,080.70

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Solution

The fourth proportional to 266,069.20, 399,103.80 and 79,080.70 is: 118,621.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,069.20 : 399,103.80 = 79,080.70 : x
  2. Step 2: Convert to fraction form
    266,069.20/399,103.80 = 79,080.70/x
  3. Step 3: Cross multiply
    266,069.20x = 399,103.80 × 79,080.70
  4. Step 4: Simplify right side
    266,069.20x = 31,561,407,876.66
  5. Step 5: Solve for x
    x = 31,561,407,876.66/266,069.20
  6. Step 6: Final answer
    x = 118,621.05

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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.