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Finding the Fourth Proportional to 139,358.48, 192,318.28 and 75,699.92

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Solution

The fourth proportional to 139,358.48, 192,318.28 and 75,699.92 is: 104,467.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,358.48 : 192,318.28 = 75,699.92 : x
  2. Step 2: Convert to fraction form
    139,358.48/192,318.28 = 75,699.92/x
  3. Step 3: Cross multiply
    139,358.48x = 192,318.28 × 75,699.92
  4. Step 4: Simplify right side
    139,358.48x = 14,558,478,410.54
  5. Step 5: Solve for x
    x = 14,558,478,410.54/139,358.48
  6. Step 6: Final answer
    x = 104,467.83

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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.