Home / 128,621.93-192,940.19-39,888.05

Finding the Fourth Proportional to 128,621.93, 192,940.19 and 39,888.05

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Solution

The fourth proportional to 128,621.93, 192,940.19 and 39,888.05 is: 59,834.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,621.93 : 192,940.19 = 39,888.05 : x
  2. Step 2: Convert to fraction form
    128,621.93/192,940.19 = 39,888.05/x
  3. Step 3: Cross multiply
    128,621.93x = 192,940.19 × 39,888.05
  4. Step 4: Simplify right side
    128,621.93x = 7,696,007,945.73
  5. Step 5: Solve for x
    x = 7,696,007,945.73/128,621.93
  6. Step 6: Final answer
    x = 59,834.34

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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.