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Finding the Fourth Proportional to 66,409.32, 91,644.84 and 36,601.32

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Solution

The fourth proportional to 66,409.32, 91,644.84 and 36,601.32 is: 50,509.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,409.32 : 91,644.84 = 36,601.32 : x
  2. Step 2: Convert to fraction form
    66,409.32/91,644.84 = 36,601.32/x
  3. Step 3: Cross multiply
    66,409.32x = 91,644.84 × 36,601.32
  4. Step 4: Simplify right side
    66,409.32x = 3,354,322,115.19
  5. Step 5: Solve for x
    x = 3,354,322,115.19/66,409.32
  6. Step 6: Final answer
    x = 50,509.81

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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.