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Finding the Fourth Proportional to 68,021.97, 93,655.91 and 61,716.29

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Solution

The fourth proportional to 68,021.97, 93,655.91 and 61,716.29 is: 84,973.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,021.97 : 93,655.91 = 61,716.29 : x
  2. Step 2: Convert to fraction form
    68,021.97/93,655.91 = 61,716.29/x
  3. Step 3: Cross multiply
    68,021.97x = 93,655.91 × 61,716.29
  4. Step 4: Simplify right side
    68,021.97x = 5,780,095,301.77
  5. Step 5: Solve for x
    x = 5,780,095,301.77/68,021.97
  6. Step 6: Final answer
    x = 84,973.95

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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.