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Finding the Fourth Proportional to 201,664.50, 278,303.49 and 111,015.78

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Solution

The fourth proportional to 201,664.50, 278,303.49 and 111,015.78 is: 153,205.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,664.50 : 278,303.49 = 111,015.78 : x
  2. Step 2: Convert to fraction form
    201,664.50/278,303.49 = 111,015.78/x
  3. Step 3: Cross multiply
    201,664.50x = 278,303.49 × 111,015.78
  4. Step 4: Simplify right side
    201,664.50x = 30,896,079,019.07
  5. Step 5: Solve for x
    x = 30,896,079,019.07/201,664.50
  6. Step 6: Final answer
    x = 153,205.34

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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.