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Finding the Fourth Proportional to 201,999.72, 278,759.51 and 111,357.21

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Solution

The fourth proportional to 201,999.72, 278,759.51 and 111,357.21 is: 153,672.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,999.72 : 278,759.51 = 111,357.21 : x
  2. Step 2: Convert to fraction form
    201,999.72/278,759.51 = 111,357.21/x
  3. Step 3: Cross multiply
    201,999.72x = 278,759.51 × 111,357.21
  4. Step 4: Simplify right side
    201,999.72x = 31,041,882,200.72
  5. Step 5: Solve for x
    x = 31,041,882,200.72/201,999.72
  6. Step 6: Final answer
    x = 153,672.89

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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.