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Finding the Fourth Proportional to 149,791.87, 206,648.58 and 86,116.15

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Solution

The fourth proportional to 149,791.87, 206,648.58 and 86,116.15 is: 118,803.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,791.87 : 206,648.58 = 86,116.15 : x
  2. Step 2: Convert to fraction form
    149,791.87/206,648.58 = 86,116.15/x
  3. Step 3: Cross multiply
    149,791.87x = 206,648.58 × 86,116.15
  4. Step 4: Simplify right side
    149,791.87x = 17,795,780,112.57
  5. Step 5: Solve for x
    x = 17,795,780,112.57/149,791.87
  6. Step 6: Final answer
    x = 118,803.38

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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.