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Finding the Fourth Proportional to 186,871.87, 257,879.59 and 101,989.54

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Solution

The fourth proportional to 186,871.87, 257,879.59 and 101,989.54 is: 140,743.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,871.87 : 257,879.59 = 101,989.54 : x
  2. Step 2: Convert to fraction form
    186,871.87/257,879.59 = 101,989.54/x
  3. Step 3: Cross multiply
    186,871.87x = 257,879.59 × 101,989.54
  4. Step 4: Simplify right side
    186,871.87x = 26,301,020,759.49
  5. Step 5: Solve for x
    x = 26,301,020,759.49/186,871.87
  6. Step 6: Final answer
    x = 140,743.61

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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.