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Finding the Fourth Proportional to 139,660.53, 192,731.58 and 75,996.96

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Solution

The fourth proportional to 139,660.53, 192,731.58 and 75,996.96 is: 104,875.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,660.53 : 192,731.58 = 75,996.96 : x
  2. Step 2: Convert to fraction form
    139,660.53/192,731.58 = 75,996.96/x
  3. Step 3: Cross multiply
    139,660.53x = 192,731.58 × 75,996.96
  4. Step 4: Simplify right side
    139,660.53x = 14,647,014,176.00
  5. Step 5: Solve for x
    x = 14,647,014,176.00/139,660.53
  6. Step 6: Final answer
    x = 104,875.83

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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.