Home / 128,111.25-192,283.49-68,190.03

Finding the Fourth Proportional to 128,111.25, 192,283.49 and 68,190.03

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Solution

The fourth proportional to 128,111.25, 192,283.49 and 68,190.03 is: 102,347.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,111.25 : 192,283.49 = 68,190.03 : x
  2. Step 2: Convert to fraction form
    128,111.25/192,283.49 = 68,190.03/x
  3. Step 3: Cross multiply
    128,111.25x = 192,283.49 × 68,190.03
  4. Step 4: Simplify right side
    128,111.25x = 13,111,816,951.60
  5. Step 5: Solve for x
    x = 13,111,816,951.60/128,111.25
  6. Step 6: Final answer
    x = 102,347.12

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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.