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Finding the Fourth Proportional to 109,072.58, 163,578.63 and 69,065.54

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Solution

The fourth proportional to 109,072.58, 163,578.63 and 69,065.54 is: 103,579.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,072.58 : 163,578.63 = 69,065.54 : x
  2. Step 2: Convert to fraction form
    109,072.58/163,578.63 = 69,065.54/x
  3. Step 3: Cross multiply
    109,072.58x = 163,578.63 × 69,065.54
  4. Step 4: Simplify right side
    109,072.58x = 11,297,646,413.41
  5. Step 5: Solve for x
    x = 11,297,646,413.41/109,072.58
  6. Step 6: Final answer
    x = 103,579.16

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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.