Home / 78,619.56-117,928.08-28,699.44

Finding the Fourth Proportional to 78,619.56, 117,928.08 and 28,699.44

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Solution

The fourth proportional to 78,619.56, 117,928.08 and 28,699.44 is: 43,048.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,619.56 : 117,928.08 = 28,699.44 : x
  2. Step 2: Convert to fraction form
    78,619.56/117,928.08 = 28,699.44/x
  3. Step 3: Cross multiply
    78,619.56x = 117,928.08 × 28,699.44
  4. Step 4: Simplify right side
    78,619.56x = 3,384,469,856.28
  5. Step 5: Solve for x
    x = 3,384,469,856.28/78,619.56
  6. Step 6: Final answer
    x = 43,048.70

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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.