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Finding the Fourth Proportional to 139,614.75, 192,653.78 and 79,166.07

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Solution

The fourth proportional to 139,614.75, 192,653.78 and 79,166.07 is: 109,240.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,614.75 : 192,653.78 = 79,166.07 : x
  2. Step 2: Convert to fraction form
    139,614.75/192,653.78 = 79,166.07/x
  3. Step 3: Cross multiply
    139,614.75x = 192,653.78 × 79,166.07
  4. Step 4: Simplify right side
    139,614.75x = 15,251,642,237.41
  5. Step 5: Solve for x
    x = 15,251,642,237.41/139,614.75
  6. Step 6: Final answer
    x = 109,240.91

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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.