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Finding the Fourth Proportional to 136,615.87, 188,531.00 and 76,190.41

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Solution

The fourth proportional to 136,615.87, 188,531.00 and 76,190.41 is: 105,143.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,615.87 : 188,531.00 = 76,190.41 : x
  2. Step 2: Convert to fraction form
    136,615.87/188,531.00 = 76,190.41/x
  3. Step 3: Cross multiply
    136,615.87x = 188,531.00 × 76,190.41
  4. Step 4: Simplify right side
    136,615.87x = 14,364,253,806.76
  5. Step 5: Solve for x
    x = 14,364,253,806.76/136,615.87
  6. Step 6: Final answer
    x = 105,143.38

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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.