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Finding the Fourth Proportional to 71,661.97, 98,667.60 and 65,018.95

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Solution

The fourth proportional to 71,661.97, 98,667.60 and 65,018.95 is: 89,521.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,661.97 : 98,667.60 = 65,018.95 : x
  2. Step 2: Convert to fraction form
    71,661.97/98,667.60 = 65,018.95/x
  3. Step 3: Cross multiply
    71,661.97x = 98,667.60 × 65,018.95
  4. Step 4: Simplify right side
    71,661.97x = 6,415,263,751.02
  5. Step 5: Solve for x
    x = 6,415,263,751.02/71,661.97
  6. Step 6: Final answer
    x = 89,521.17

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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.