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Finding the Fourth Proportional to 60,661.90, 90,969.76 and 18,529.14

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Solution

The fourth proportional to 60,661.90, 90,969.76 and 18,529.14 is: 27,786.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,661.90 : 90,969.76 = 18,529.14 : x
  2. Step 2: Convert to fraction form
    60,661.90/90,969.76 = 18,529.14/x
  3. Step 3: Cross multiply
    60,661.90x = 90,969.76 × 18,529.14
  4. Step 4: Simplify right side
    60,661.90x = 1,685,591,418.81
  5. Step 5: Solve for x
    x = 1,685,591,418.81/60,661.90
  6. Step 6: Final answer
    x = 27,786.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.