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Finding the Fourth Proportional to 78,180.33, 117,270.59 and 19,015.59

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Solution

The fourth proportional to 78,180.33, 117,270.59 and 19,015.59 is: 28,523.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,180.33 : 117,270.59 = 19,015.59 : x
  2. Step 2: Convert to fraction form
    78,180.33/117,270.59 = 19,015.59/x
  3. Step 3: Cross multiply
    78,180.33x = 117,270.59 × 19,015.59
  4. Step 4: Simplify right side
    78,180.33x = 2,229,969,458.50
  5. Step 5: Solve for x
    x = 2,229,969,458.50/78,180.33
  6. Step 6: Final answer
    x = 28,523.41

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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.