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Finding the Fourth Proportional to 201,998.55, 278,759.94 and 111,358.05

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Solution

The fourth proportional to 201,998.55, 278,759.94 and 111,358.05 is: 153,675.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,998.55 : 278,759.94 = 111,358.05 : x
  2. Step 2: Convert to fraction form
    201,998.55/278,759.94 = 111,358.05/x
  3. Step 3: Cross multiply
    201,998.55x = 278,759.94 × 111,358.05
  4. Step 4: Simplify right side
    201,998.55x = 31,042,163,336.52
  5. Step 5: Solve for x
    x = 31,042,163,336.52/201,998.55
  6. Step 6: Final answer
    x = 153,675.18

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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.