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Finding the Fourth Proportional to 139,703.27, 192,817.08 and 79,279.54

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Solution

The fourth proportional to 139,703.27, 192,817.08 and 79,279.54 is: 109,420.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,703.27 : 192,817.08 = 79,279.54 : x
  2. Step 2: Convert to fraction form
    139,703.27/192,817.08 = 79,279.54/x
  3. Step 3: Cross multiply
    139,703.27x = 192,817.08 × 79,279.54
  4. Step 4: Simplify right side
    139,703.27x = 15,286,448,924.50
  5. Step 5: Solve for x
    x = 15,286,448,924.50/139,703.27
  6. Step 6: Final answer
    x = 109,420.84

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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.