Home / 256,269.41-384,440.87-78,791.32

Finding the Fourth Proportional to 256,269.41, 384,440.87 and 78,791.32

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Solution

The fourth proportional to 256,269.41, 384,440.87 and 78,791.32 is: 118,198.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,269.41 : 384,440.87 = 78,791.32 : x
  2. Step 2: Convert to fraction form
    256,269.41/384,440.87 = 78,791.32/x
  3. Step 3: Cross multiply
    256,269.41x = 384,440.87 × 78,791.32
  4. Step 4: Simplify right side
    256,269.41x = 30,290,603,609.25
  5. Step 5: Solve for x
    x = 30,290,603,609.25/256,269.41
  6. Step 6: Final answer
    x = 118,198.28

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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.