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Finding the Fourth Proportional to 266,391.68, 399,192 and 108,426.88

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Solution

The fourth proportional to 266,391.68, 399,192 and 108,426.88 is: 162,479.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,391.68 : 399,192 = 108,426.88 : x
  2. Step 2: Convert to fraction form
    266,391.68/399,192 = 108,426.88/x
  3. Step 3: Cross multiply
    266,391.68x = 399,192 × 108,426.88
  4. Step 4: Simplify right side
    266,391.68x = 43,283,143,080.96
  5. Step 5: Solve for x
    x = 43,283,143,080.96/266,391.68
  6. Step 6: Final answer
    x = 162,479.34

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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.