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Finding the Fourth Proportional to 279,072.60, 418,589.70 and 89,530.20

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Solution

The fourth proportional to 279,072.60, 418,589.70 and 89,530.20 is: 134,289.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,072.60 : 418,589.70 = 89,530.20 : x
  2. Step 2: Convert to fraction form
    279,072.60/418,589.70 = 89,530.20/x
  3. Step 3: Cross multiply
    279,072.60x = 418,589.70 × 89,530.20
  4. Step 4: Simplify right side
    279,072.60x = 37,476,419,558.94
  5. Step 5: Solve for x
    x = 37,476,419,558.94/279,072.60
  6. Step 6: Final answer
    x = 134,289.14

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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.