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Finding the Fourth Proportional to 66,419.09, 91,657.74 and 36,204.41

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Solution

The fourth proportional to 66,419.09, 91,657.74 and 36,204.41 is: 49,961.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,419.09 : 91,657.74 = 36,204.41 : x
  2. Step 2: Convert to fraction form
    66,419.09/91,657.74 = 36,204.41/x
  3. Step 3: Cross multiply
    66,419.09x = 91,657.74 × 36,204.41
  4. Step 4: Simplify right side
    66,419.09x = 3,318,413,940.34
  5. Step 5: Solve for x
    x = 3,318,413,940.34/66,419.09
  6. Step 6: Final answer
    x = 49,961.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.