Home / 259,621.20-389,431.80-109,969.65

Finding the Fourth Proportional to 259,621.20, 389,431.80 and 109,969.65

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Solution

The fourth proportional to 259,621.20, 389,431.80 and 109,969.65 is: 164,954.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,621.20 : 389,431.80 = 109,969.65 : x
  2. Step 2: Convert to fraction form
    259,621.20/389,431.80 = 109,969.65/x
  3. Step 3: Cross multiply
    259,621.20x = 389,431.80 × 109,969.65
  4. Step 4: Simplify right side
    259,621.20x = 42,825,678,744.87
  5. Step 5: Solve for x
    x = 42,825,678,744.87/259,621.20
  6. Step 6: Final answer
    x = 164,954.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.