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Finding the Fourth Proportional to 68,726.85, 103,106.37 and 21,339.51

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Solution

The fourth proportional to 68,726.85, 103,106.37 and 21,339.51 is: 32,014.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,726.85 : 103,106.37 = 21,339.51 : x
  2. Step 2: Convert to fraction form
    68,726.85/103,106.37 = 21,339.51/x
  3. Step 3: Cross multiply
    68,726.85x = 103,106.37 × 21,339.51
  4. Step 4: Simplify right side
    68,726.85x = 2,200,239,413.68
  5. Step 5: Solve for x
    x = 2,200,239,413.68/68,726.85
  6. Step 6: Final answer
    x = 32,014.26

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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.