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Finding the Fourth Proportional to 139,614.21, 192,663.45 and 79,190.37

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Solution

The fourth proportional to 139,614.21, 192,663.45 and 79,190.37 is: 109,280.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,614.21 : 192,663.45 = 79,190.37 : x
  2. Step 2: Convert to fraction form
    139,614.21/192,663.45 = 79,190.37/x
  3. Step 3: Cross multiply
    139,614.21x = 192,663.45 × 79,190.37
  4. Step 4: Simplify right side
    139,614.21x = 15,257,089,890.98
  5. Step 5: Solve for x
    x = 15,257,089,890.98/139,614.21
  6. Step 6: Final answer
    x = 109,280.35

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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.