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Finding the Fourth Proportional to 128,025.32, 192,067.85 and 43,786.13

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Solution

The fourth proportional to 128,025.32, 192,067.85 and 43,786.13 is: 65,689.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,025.32 : 192,067.85 = 43,786.13 : x
  2. Step 2: Convert to fraction form
    128,025.32/192,067.85 = 43,786.13/x
  3. Step 3: Cross multiply
    128,025.32x = 192,067.85 × 43,786.13
  4. Step 4: Simplify right side
    128,025.32x = 8,409,907,848.92
  5. Step 5: Solve for x
    x = 8,409,907,848.92/128,025.32
  6. Step 6: Final answer
    x = 65,689.41

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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.