Home / 259,923.78-389,899.44-72,949.86

Finding the Fourth Proportional to 259,923.78, 389,899.44 and 72,949.86

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Solution

The fourth proportional to 259,923.78, 389,899.44 and 72,949.86 is: 109,428.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,923.78 : 389,899.44 = 72,949.86 : x
  2. Step 2: Convert to fraction form
    259,923.78/389,899.44 = 72,949.86/x
  3. Step 3: Cross multiply
    259,923.78x = 389,899.44 × 72,949.86
  4. Step 4: Simplify right side
    259,923.78x = 28,443,109,562.08
  5. Step 5: Solve for x
    x = 28,443,109,562.08/259,923.78
  6. Step 6: Final answer
    x = 109,428.65

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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.