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Finding the Fourth Proportional to 33,830.40, 50,745.60 and 33,139.20

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Solution

The fourth proportional to 33,830.40, 50,745.60 and 33,139.20 is: 49,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,830.40 : 50,745.60 = 33,139.20 : x
  2. Step 2: Convert to fraction form
    33,830.40/50,745.60 = 33,139.20/x
  3. Step 3: Cross multiply
    33,830.40x = 50,745.60 × 33,139.20
  4. Step 4: Simplify right side
    33,830.40x = 1,681,668,587.52
  5. Step 5: Solve for x
    x = 1,681,668,587.52/33,830.40
  6. Step 6: Final answer
    x = 49,708.80

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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.