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Finding the Fourth Proportional to 190,614.06, 285,921.09 and 78,275.16

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Solution

The fourth proportional to 190,614.06, 285,921.09 and 78,275.16 is: 117,412.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,614.06 : 285,921.09 = 78,275.16 : x
  2. Step 2: Convert to fraction form
    190,614.06/285,921.09 = 78,275.16/x
  3. Step 3: Cross multiply
    190,614.06x = 285,921.09 × 78,275.16
  4. Step 4: Simplify right side
    190,614.06x = 22,380,519,067.12
  5. Step 5: Solve for x
    x = 22,380,519,067.12/190,614.06
  6. Step 6: Final answer
    x = 117,412.74

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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.