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Finding the Fourth Proportional to 66,906.39, 100,359.63 and 16,990.23

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Solution

The fourth proportional to 66,906.39, 100,359.63 and 16,990.23 is: 25,485.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,906.39 : 100,359.63 = 16,990.23 : x
  2. Step 2: Convert to fraction form
    66,906.39/100,359.63 = 16,990.23/x
  3. Step 3: Cross multiply
    66,906.39x = 100,359.63 × 16,990.23
  4. Step 4: Simplify right side
    66,906.39x = 1,705,133,196.41
  5. Step 5: Solve for x
    x = 1,705,133,196.41/66,906.39
  6. Step 6: Final answer
    x = 25,485.36

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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.