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Finding the Fourth Proportional to 279,075.26, 418,612.89 and 68,713.20

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Solution

The fourth proportional to 279,075.26, 418,612.89 and 68,713.20 is: 103,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,075.26 : 418,612.89 = 68,713.20 : x
  2. Step 2: Convert to fraction form
    279,075.26/418,612.89 = 68,713.20/x
  3. Step 3: Cross multiply
    279,075.26x = 418,612.89 × 68,713.20
  4. Step 4: Simplify right side
    279,075.26x = 28,764,231,233.15
  5. Step 5: Solve for x
    x = 28,764,231,233.15/279,075.26
  6. Step 6: Final answer
    x = 103,069.80

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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.