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Finding the Fourth Proportional to 266,418, 399,617.80 and 66,740.12

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Solution

The fourth proportional to 266,418, 399,617.80 and 66,740.12 is: 100,107.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,418 : 399,617.80 = 66,740.12 : x
  2. Step 2: Convert to fraction form
    266,418/399,617.80 = 66,740.12/x
  3. Step 3: Cross multiply
    266,418x = 399,617.80 × 66,740.12
  4. Step 4: Simplify right side
    266,418x = 26,670,539,926.14
  5. Step 5: Solve for x
    x = 26,670,539,926.14/266,418
  6. Step 6: Final answer
    x = 100,107.88

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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.