Home / 259,406.64-389,121.89-79,479.18

Finding the Fourth Proportional to 259,406.64, 389,121.89 and 79,479.18

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Solution

The fourth proportional to 259,406.64, 389,121.89 and 79,479.18 is: 119,222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,406.64 : 389,121.89 = 79,479.18 : x
  2. Step 2: Convert to fraction form
    259,406.64/389,121.89 = 79,479.18/x
  3. Step 3: Cross multiply
    259,406.64x = 389,121.89 × 79,479.18
  4. Step 4: Simplify right side
    259,406.64x = 30,927,088,339.85
  5. Step 5: Solve for x
    x = 30,927,088,339.85/259,406.64
  6. Step 6: Final answer
    x = 119,222.42

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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.