Home / 128,107.58-192,161.63-39,360.47

Finding the Fourth Proportional to 128,107.58, 192,161.63 and 39,360.47

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Solution

The fourth proportional to 128,107.58, 192,161.63 and 39,360.47 is: 59,040.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,107.58 : 192,161.63 = 39,360.47 : x
  2. Step 2: Convert to fraction form
    128,107.58/192,161.63 = 39,360.47/x
  3. Step 3: Cross multiply
    128,107.58x = 192,161.63 × 39,360.47
  4. Step 4: Simplify right side
    128,107.58x = 7,563,571,210.36
  5. Step 5: Solve for x
    x = 7,563,571,210.36/128,107.58
  6. Step 6: Final answer
    x = 59,040.78

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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.