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Finding the Fourth Proportional to 79,078.20, 118,578.90 and 43,980.60

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Solution

The fourth proportional to 79,078.20, 118,578.90 and 43,980.60 is: 65,949.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,078.20 : 118,578.90 = 43,980.60 : x
  2. Step 2: Convert to fraction form
    79,078.20/118,578.90 = 43,980.60/x
  3. Step 3: Cross multiply
    79,078.20x = 118,578.90 × 43,980.60
  4. Step 4: Simplify right side
    79,078.20x = 5,215,171,169.34
  5. Step 5: Solve for x
    x = 5,215,171,169.34/79,078.20
  6. Step 6: Final answer
    x = 65,949.54

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1.5x scale

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.