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Finding the Fourth Proportional to 127,982.40, 192,069.60 and 65,620.80

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Solution

The fourth proportional to 127,982.40, 192,069.60 and 65,620.80 is: 98,480.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,982.40 : 192,069.60 = 65,620.80 : x
  2. Step 2: Convert to fraction form
    127,982.40/192,069.60 = 65,620.80/x
  3. Step 3: Cross multiply
    127,982.40x = 192,069.60 × 65,620.80
  4. Step 4: Simplify right side
    127,982.40x = 12,603,760,807.68
  5. Step 5: Solve for x
    x = 12,603,760,807.68/127,982.40
  6. Step 6: Final answer
    x = 98,480.42

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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.