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Finding the Fourth Proportional to 139,762.73, 192,889.92 and 79,352.93

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Solution

The fourth proportional to 139,762.73, 192,889.92 and 79,352.93 is: 109,516.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,762.73 : 192,889.92 = 79,352.93 : x
  2. Step 2: Convert to fraction form
    139,762.73/192,889.92 = 79,352.93/x
  3. Step 3: Cross multiply
    139,762.73x = 192,889.92 × 79,352.93
  4. Step 4: Simplify right side
    139,762.73x = 15,306,379,355.02
  5. Step 5: Solve for x
    x = 15,306,379,355.02/139,762.73
  6. Step 6: Final answer
    x = 109,516.89

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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.