Home / 128,040.90-192,061.35-105,879.30

Finding the Fourth Proportional to 128,040.90, 192,061.35 and 105,879.30

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Solution

The fourth proportional to 128,040.90, 192,061.35 and 105,879.30 is: 158,818.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,040.90 : 192,061.35 = 105,879.30 : x
  2. Step 2: Convert to fraction form
    128,040.90/192,061.35 = 105,879.30/x
  3. Step 3: Cross multiply
    128,040.90x = 192,061.35 × 105,879.30
  4. Step 4: Simplify right side
    128,040.90x = 20,335,321,295.06
  5. Step 5: Solve for x
    x = 20,335,321,295.06/128,040.90
  6. Step 6: Final answer
    x = 158,818.95

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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.