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Finding the Fourth Proportional to 139,575.86, 192,622.56 and 75,912.38

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Solution

The fourth proportional to 139,575.86, 192,622.56 and 75,912.38 is: 104,763.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,575.86 : 192,622.56 = 75,912.38 : x
  2. Step 2: Convert to fraction form
    139,575.86/192,622.56 = 75,912.38/x
  3. Step 3: Cross multiply
    139,575.86x = 192,622.56 × 75,912.38
  4. Step 4: Simplify right side
    139,575.86x = 14,622,436,971.29
  5. Step 5: Solve for x
    x = 14,622,436,971.29/139,575.86
  6. Step 6: Final answer
    x = 104,763.37

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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.