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Finding the Fourth Proportional to 66,906.89, 100,360.38 and 16,990.73

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Solution

The fourth proportional to 66,906.89, 100,360.38 and 16,990.73 is: 25,486.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,906.89 : 100,360.38 = 16,990.73 : x
  2. Step 2: Convert to fraction form
    66,906.89/100,360.38 = 16,990.73/x
  3. Step 3: Cross multiply
    66,906.89x = 100,360.38 × 16,990.73
  4. Step 4: Simplify right side
    66,906.89x = 1,705,196,119.28
  5. Step 5: Solve for x
    x = 1,705,196,119.28/66,906.89
  6. Step 6: Final answer
    x = 25,486.11

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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.