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Finding the Fourth Proportional to 139,668.92, 192,747.48 and 79,242.11

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Solution

The fourth proportional to 139,668.92, 192,747.48 and 79,242.11 is: 109,356.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,668.92 : 192,747.48 = 79,242.11 : x
  2. Step 2: Convert to fraction form
    139,668.92/192,747.48 = 79,242.11/x
  3. Step 3: Cross multiply
    139,668.92x = 192,747.48 × 79,242.11
  4. Step 4: Simplify right side
    139,668.92x = 15,273,717,012.38
  5. Step 5: Solve for x
    x = 15,273,717,012.38/139,668.92
  6. Step 6: Final answer
    x = 109,356.59

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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.