Home / 78,212.09-117,322.70-30,180.95

Finding the Fourth Proportional to 78,212.09, 117,322.70 and 30,180.95

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Solution

The fourth proportional to 78,212.09, 117,322.70 and 30,180.95 is: 45,273.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,212.09 : 117,322.70 = 30,180.95 : x
  2. Step 2: Convert to fraction form
    78,212.09/117,322.70 = 30,180.95/x
  3. Step 3: Cross multiply
    78,212.09x = 117,322.70 × 30,180.95
  4. Step 4: Simplify right side
    78,212.09x = 3,540,910,542.57
  5. Step 5: Solve for x
    x = 3,540,910,542.57/78,212.09
  6. Step 6: Final answer
    x = 45,273.19

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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.