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Finding the Fourth Proportional to 190,387.92, 262,728.72 and 105,512.88

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Solution

The fourth proportional to 190,387.92, 262,728.72 and 105,512.88 is: 145,604.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,387.92 : 262,728.72 = 105,512.88 : x
  2. Step 2: Convert to fraction form
    190,387.92/262,728.72 = 105,512.88/x
  3. Step 3: Cross multiply
    190,387.92x = 262,728.72 × 105,512.88
  4. Step 4: Simplify right side
    190,387.92x = 27,721,263,905.91
  5. Step 5: Solve for x
    x = 27,721,263,905.91/190,387.92
  6. Step 6: Final answer
    x = 145,604.11

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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.