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Finding the Fourth Proportional to 266,048.20, 399,072.30 and 126,080.20

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Solution

The fourth proportional to 266,048.20, 399,072.30 and 126,080.20 is: 189,120.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,048.20 : 399,072.30 = 126,080.20 : x
  2. Step 2: Convert to fraction form
    266,048.20/399,072.30 = 126,080.20/x
  3. Step 3: Cross multiply
    266,048.20x = 399,072.30 × 126,080.20
  4. Step 4: Simplify right side
    266,048.20x = 50,315,115,398.46
  5. Step 5: Solve for x
    x = 50,315,115,398.46/266,048.20
  6. Step 6: Final answer
    x = 189,120.30

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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.