Home / 255,919.08-383,934.78-78,439.44

Finding the Fourth Proportional to 255,919.08, 383,934.78 and 78,439.44

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Solution

The fourth proportional to 255,919.08, 383,934.78 and 78,439.44 is: 117,676.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,919.08 : 383,934.78 = 78,439.44 : x
  2. Step 2: Convert to fraction form
    255,919.08/383,934.78 = 78,439.44/x
  3. Step 3: Cross multiply
    255,919.08x = 383,934.78 × 78,439.44
  4. Step 4: Simplify right side
    255,919.08x = 30,115,629,139.72
  5. Step 5: Solve for x
    x = 30,115,629,139.72/255,919.08
  6. Step 6: Final answer
    x = 117,676.37

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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.