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Finding the Fourth Proportional to 71,784.23, 107,668.11 and 19,197.81

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Solution

The fourth proportional to 71,784.23, 107,668.11 and 19,197.81 is: 28,794.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,784.23 : 107,668.11 = 19,197.81 : x
  2. Step 2: Convert to fraction form
    71,784.23/107,668.11 = 19,197.81/x
  3. Step 3: Cross multiply
    71,784.23x = 107,668.11 × 19,197.81
  4. Step 4: Simplify right side
    71,784.23x = 2,066,991,918.84
  5. Step 5: Solve for x
    x = 2,066,991,918.84/71,784.23
  6. Step 6: Final answer
    x = 28,794.51

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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.