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Finding the Fourth Proportional to 139,668.28, 192,762.98 and 82,289.26

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Solution

The fourth proportional to 139,668.28, 192,762.98 and 82,289.26 is: 113,571.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,668.28 : 192,762.98 = 82,289.26 : x
  2. Step 2: Convert to fraction form
    139,668.28/192,762.98 = 82,289.26/x
  3. Step 3: Cross multiply
    139,668.28x = 192,762.98 × 82,289.26
  4. Step 4: Simplify right side
    139,668.28x = 15,862,321,604.33
  5. Step 5: Solve for x
    x = 15,862,321,604.33/139,668.28
  6. Step 6: Final answer
    x = 113,571.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.