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Finding the Fourth Proportional to 139,725, 192,835.08 and 79,311.96

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Solution

The fourth proportional to 139,725, 192,835.08 and 79,311.96 is: 109,458.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,725 : 192,835.08 = 79,311.96 : x
  2. Step 2: Convert to fraction form
    139,725/192,835.08 = 79,311.96/x
  3. Step 3: Cross multiply
    139,725x = 192,835.08 × 79,311.96
  4. Step 4: Simplify right side
    139,725x = 15,294,128,151.56
  5. Step 5: Solve for x
    x = 15,294,128,151.56/139,725
  6. Step 6: Final answer
    x = 109,458.78

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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.