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Finding the Fourth Proportional to 71,109.69, 106,664.67 and 18,519.09

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Solution

The fourth proportional to 71,109.69, 106,664.67 and 18,519.09 is: 27,778.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,109.69 : 106,664.67 = 18,519.09 : x
  2. Step 2: Convert to fraction form
    71,109.69/106,664.67 = 18,519.09/x
  3. Step 3: Cross multiply
    71,109.69x = 106,664.67 × 18,519.09
  4. Step 4: Simplify right side
    71,109.69x = 1,975,332,623.55
  5. Step 5: Solve for x
    x = 1,975,332,623.55/71,109.69
  6. Step 6: Final answer
    x = 27,778.67

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1.5x scale

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.