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Finding the Fourth Proportional to 192,279.20, 288,159.60 and 128,919.20

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Solution

The fourth proportional to 192,279.20, 288,159.60 and 128,919.20 is: 193,205.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,279.20 : 288,159.60 = 128,919.20 : x
  2. Step 2: Convert to fraction form
    192,279.20/288,159.60 = 128,919.20/x
  3. Step 3: Cross multiply
    192,279.20x = 288,159.60 × 128,919.20
  4. Step 4: Simplify right side
    192,279.20x = 37,149,305,104.32
  5. Step 5: Solve for x
    x = 37,149,305,104.32/192,279.20
  6. Step 6: Final answer
    x = 193,205.01

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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.