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Finding the Fourth Proportional to 199,886.96, 275,817.35 and 128,363.86

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Solution

The fourth proportional to 199,886.96, 275,817.35 and 128,363.86 is: 177,125.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,886.96 : 275,817.35 = 128,363.86 : x
  2. Step 2: Convert to fraction form
    199,886.96/275,817.35 = 128,363.86/x
  3. Step 3: Cross multiply
    199,886.96x = 275,817.35 × 128,363.86
  4. Step 4: Simplify right side
    199,886.96x = 35,404,980,366.65
  5. Step 5: Solve for x
    x = 35,404,980,366.65/199,886.96
  6. Step 6: Final answer
    x = 177,125.01

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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.