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Finding the Fourth Proportional to 163,561.14, 225,711.09 and 91,940.40

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Solution

The fourth proportional to 163,561.14, 225,711.09 and 91,940.40 is: 126,875.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,561.14 : 225,711.09 = 91,940.40 : x
  2. Step 2: Convert to fraction form
    163,561.14/225,711.09 = 91,940.40/x
  3. Step 3: Cross multiply
    163,561.14x = 225,711.09 × 91,940.40
  4. Step 4: Simplify right side
    163,561.14x = 20,751,967,899.04
  5. Step 5: Solve for x
    x = 20,751,967,899.04/163,561.14
  6. Step 6: Final answer
    x = 126,875.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.