Home / 199,128.40-298,255.20-120,104.80

Finding the Fourth Proportional to 199,128.40, 298,255.20 and 120,104.80

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Solution

The fourth proportional to 199,128.40, 298,255.20 and 120,104.80 is: 179,893.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,128.40 : 298,255.20 = 120,104.80 : x
  2. Step 2: Convert to fraction form
    199,128.40/298,255.20 = 120,104.80/x
  3. Step 3: Cross multiply
    199,128.40x = 298,255.20 × 120,104.80
  4. Step 4: Simplify right side
    199,128.40x = 35,821,881,144.96
  5. Step 5: Solve for x
    x = 35,821,881,144.96/199,128.40
  6. Step 6: Final answer
    x = 179,893.38

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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.