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Finding the Fourth Proportional to 139,231.08, 192,139.08 and 75,568.88

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Solution

The fourth proportional to 139,231.08, 192,139.08 and 75,568.88 is: 104,285.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,231.08 : 192,139.08 = 75,568.88 : x
  2. Step 2: Convert to fraction form
    139,231.08/192,139.08 = 75,568.88/x
  3. Step 3: Cross multiply
    139,231.08x = 192,139.08 × 75,568.88
  4. Step 4: Simplify right side
    139,231.08x = 14,519,734,119.14
  5. Step 5: Solve for x
    x = 14,519,734,119.14/139,231.08
  6. Step 6: Final answer
    x = 104,285.15

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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.