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Finding the Fourth Proportional to 71,240, 106,861.44 and 18,654.08

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Solution

The fourth proportional to 71,240, 106,861.44 and 18,654.08 is: 27,981.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,240 : 106,861.44 = 18,654.08 : x
  2. Step 2: Convert to fraction form
    71,240/106,861.44 = 18,654.08/x
  3. Step 3: Cross multiply
    71,240x = 106,861.44 × 18,654.08
  4. Step 4: Simplify right side
    71,240x = 1,993,401,850.68
  5. Step 5: Solve for x
    x = 1,993,401,850.68/71,240
  6. Step 6: Final answer
    x = 27,981.50

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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.