Home / 78,198.77-117,273.38-28,272.26

Finding the Fourth Proportional to 78,198.77, 117,273.38 and 28,272.26

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Solution

The fourth proportional to 78,198.77, 117,273.38 and 28,272.26 is: 42,399.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,198.77 : 117,273.38 = 28,272.26 : x
  2. Step 2: Convert to fraction form
    78,198.77/117,273.38 = 28,272.26/x
  3. Step 3: Cross multiply
    78,198.77x = 117,273.38 × 28,272.26
  4. Step 4: Simplify right side
    78,198.77x = 3,315,582,762.71
  5. Step 5: Solve for x
    x = 3,315,582,762.71/78,198.77
  6. Step 6: Final answer
    x = 42,399.43

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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.