Home / 128,905.70-192,811.80-115,674.35

Finding the Fourth Proportional to 128,905.70, 192,811.80 and 115,674.35

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Solution

The fourth proportional to 128,905.70, 192,811.80 and 115,674.35 is: 173,020.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,905.70 : 192,811.80 = 115,674.35 : x
  2. Step 2: Convert to fraction form
    128,905.70/192,811.80 = 115,674.35/x
  3. Step 3: Cross multiply
    128,905.70x = 192,811.80 × 115,674.35
  4. Step 4: Simplify right side
    128,905.70x = 22,303,379,637.33
  5. Step 5: Solve for x
    x = 22,303,379,637.33/128,905.70
  6. Step 6: Final answer
    x = 173,020.90

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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.