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Finding the Fourth Proportional to 190,645.88, 285,968.81 and 65,986.88

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Solution

The fourth proportional to 190,645.88, 285,968.81 and 65,986.88 is: 98,980.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,645.88 : 285,968.81 = 65,986.88 : x
  2. Step 2: Convert to fraction form
    190,645.88/285,968.81 = 65,986.88/x
  3. Step 3: Cross multiply
    190,645.88x = 285,968.81 × 65,986.88
  4. Step 4: Simplify right side
    190,645.88x = 18,870,188,284.34
  5. Step 5: Solve for x
    x = 18,870,188,284.34/190,645.88
  6. Step 6: Final answer
    x = 98,980.31

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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.