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Finding the Fourth Proportional to 279,318.18, 418,978.14 and 68,956.14

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Solution

The fourth proportional to 279,318.18, 418,978.14 and 68,956.14 is: 103,434.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,318.18 : 418,978.14 = 68,956.14 : x
  2. Step 2: Convert to fraction form
    279,318.18/418,978.14 = 68,956.14/x
  3. Step 3: Cross multiply
    279,318.18x = 418,978.14 × 68,956.14
  4. Step 4: Simplify right side
    279,318.18x = 28,891,115,278.78
  5. Step 5: Solve for x
    x = 28,891,115,278.78/279,318.18
  6. Step 6: Final answer
    x = 103,434.42

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.