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Finding the Fourth Proportional to 68,990.14, 103,485.21 and 21,608.93

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Solution

The fourth proportional to 68,990.14, 103,485.21 and 21,608.93 is: 32,413.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,990.14 : 103,485.21 = 21,608.93 : x
  2. Step 2: Convert to fraction form
    68,990.14/103,485.21 = 21,608.93/x
  3. Step 3: Cross multiply
    68,990.14x = 103,485.21 × 21,608.93
  4. Step 4: Simplify right side
    68,990.14x = 2,236,204,917.64
  5. Step 5: Solve for x
    x = 2,236,204,917.64/68,990.14
  6. Step 6: Final answer
    x = 32,413.40

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1.5x scale

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.