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Finding the Fourth Proportional to 52,579.72, 78,885.78 and 18,388.96

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Solution

The fourth proportional to 52,579.72, 78,885.78 and 18,388.96 is: 27,589.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,579.72 : 78,885.78 = 18,388.96 : x
  2. Step 2: Convert to fraction form
    52,579.72/78,885.78 = 18,388.96/x
  3. Step 3: Cross multiply
    52,579.72x = 78,885.78 × 18,388.96
  4. Step 4: Simplify right side
    52,579.72x = 1,450,627,452.99
  5. Step 5: Solve for x
    x = 1,450,627,452.99/52,579.72
  6. Step 6: Final answer
    x = 27,589.11

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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.