Home / 259,986.78-389,994.12-73,012.86

Finding the Fourth Proportional to 259,986.78, 389,994.12 and 73,012.86

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Solution

The fourth proportional to 259,986.78, 389,994.12 and 73,012.86 is: 109,523.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,986.78 : 389,994.12 = 73,012.86 : x
  2. Step 2: Convert to fraction form
    259,986.78/389,994.12 = 73,012.86/x
  3. Step 3: Cross multiply
    259,986.78x = 389,994.12 × 73,012.86
  4. Step 4: Simplify right side
    259,986.78x = 28,474,586,084.38
  5. Step 5: Solve for x
    x = 28,474,586,084.38/259,986.78
  6. Step 6: Final answer
    x = 109,523.21

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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.