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Finding the Fourth Proportional to 139,410.52, 192,388.26 and 75,749.38

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Solution

The fourth proportional to 139,410.52, 192,388.26 and 75,749.38 is: 104,535.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,410.52 : 192,388.26 = 75,749.38 : x
  2. Step 2: Convert to fraction form
    139,410.52/192,388.26 = 75,749.38/x
  3. Step 3: Cross multiply
    139,410.52x = 192,388.26 × 75,749.38
  4. Step 4: Simplify right side
    139,410.52x = 14,573,291,217.37
  5. Step 5: Solve for x
    x = 14,573,291,217.37/139,410.52
  6. Step 6: Final answer
    x = 104,535.09

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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.