Home / 78,287.40-117,435.05-22,131.54

Finding the Fourth Proportional to 78,287.40, 117,435.05 and 22,131.54

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Solution

The fourth proportional to 78,287.40, 117,435.05 and 22,131.54 is: 33,198.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,287.40 : 117,435.05 = 22,131.54 : x
  2. Step 2: Convert to fraction form
    78,287.40/117,435.05 = 22,131.54/x
  3. Step 3: Cross multiply
    78,287.40x = 117,435.05 × 22,131.54
  4. Step 4: Simplify right side
    78,287.40x = 2,599,018,855.39
  5. Step 5: Solve for x
    x = 2,599,018,855.39/78,287.40
  6. Step 6: Final answer
    x = 33,198.43

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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.