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Finding the Fourth Proportional to 139,668.91, 192,747.45 and 79,242.10

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Solution

The fourth proportional to 139,668.91, 192,747.45 and 79,242.10 is: 109,356.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,668.91 : 192,747.45 = 79,242.10 : x
  2. Step 2: Convert to fraction form
    139,668.91/192,747.45 = 79,242.10/x
  3. Step 3: Cross multiply
    139,668.91x = 192,747.45 × 79,242.10
  4. Step 4: Simplify right side
    139,668.91x = 15,273,712,077.20
  5. Step 5: Solve for x
    x = 15,273,712,077.20/139,668.91
  6. Step 6: Final answer
    x = 109,356.57

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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.