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Finding the Fourth Proportional to 66,621.75, 91,940.48 and 36,409.10

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Solution

The fourth proportional to 66,621.75, 91,940.48 and 36,409.10 is: 50,245.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,621.75 : 91,940.48 = 36,409.10 : x
  2. Step 2: Convert to fraction form
    66,621.75/91,940.48 = 36,409.10/x
  3. Step 3: Cross multiply
    66,621.75x = 91,940.48 × 36,409.10
  4. Step 4: Simplify right side
    66,621.75x = 3,347,470,130.37
  5. Step 5: Solve for x
    x = 3,347,470,130.37/66,621.75
  6. Step 6: Final answer
    x = 50,245.91

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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.