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Finding the Fourth Proportional to 128,149.60, 192,418.80 and 98,600.80

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Solution

The fourth proportional to 128,149.60, 192,418.80 and 98,600.80 is: 148,050.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,149.60 : 192,418.80 = 98,600.80 : x
  2. Step 2: Convert to fraction form
    128,149.60/192,418.80 = 98,600.80/x
  3. Step 3: Cross multiply
    128,149.60x = 192,418.80 × 98,600.80
  4. Step 4: Simplify right side
    128,149.60x = 18,972,647,615.04
  5. Step 5: Solve for x
    x = 18,972,647,615.04/128,149.60
  6. Step 6: Final answer
    x = 148,050.78

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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.