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Finding the Fourth Proportional to 139,724.86, 192,846.87 and 79,301.16

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Solution

The fourth proportional to 139,724.86, 192,846.87 and 79,301.16 is: 109,450.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,724.86 : 192,846.87 = 79,301.16 : x
  2. Step 2: Convert to fraction form
    139,724.86/192,846.87 = 79,301.16/x
  3. Step 3: Cross multiply
    139,724.86x = 192,846.87 × 79,301.16
  4. Step 4: Simplify right side
    139,724.86x = 15,292,980,790.75
  5. Step 5: Solve for x
    x = 15,292,980,790.75/139,724.86
  6. Step 6: Final answer
    x = 109,450.68

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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.