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Finding the Fourth Proportional to 71,668.87, 107,502.69 and 18,360.75

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Solution

The fourth proportional to 71,668.87, 107,502.69 and 18,360.75 is: 27,540.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,668.87 : 107,502.69 = 18,360.75 : x
  2. Step 2: Convert to fraction form
    71,668.87/107,502.69 = 18,360.75/x
  3. Step 3: Cross multiply
    71,668.87x = 107,502.69 × 18,360.75
  4. Step 4: Simplify right side
    71,668.87x = 1,973,830,015.42
  5. Step 5: Solve for x
    x = 1,973,830,015.42/71,668.87
  6. Step 6: Final answer
    x = 27,540.97

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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.