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Finding the Fourth Proportional to 139,651.26, 192,685.92 and 79,207.98

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Solution

The fourth proportional to 139,651.26, 192,685.92 and 79,207.98 is: 109,288.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,651.26 : 192,685.92 = 79,207.98 : x
  2. Step 2: Convert to fraction form
    139,651.26/192,685.92 = 79,207.98/x
  3. Step 3: Cross multiply
    139,651.26x = 192,685.92 × 79,207.98
  4. Step 4: Simplify right side
    139,651.26x = 15,262,262,497.64
  5. Step 5: Solve for x
    x = 15,262,262,497.64/139,651.26
  6. Step 6: Final answer
    x = 109,288.40

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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.