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Finding the Fourth Proportional to 66,378.08, 91,600.68 and 36,163.78

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Solution

The fourth proportional to 66,378.08, 91,600.68 and 36,163.78 is: 49,905.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,378.08 : 91,600.68 = 36,163.78 : x
  2. Step 2: Convert to fraction form
    66,378.08/91,600.68 = 36,163.78/x
  3. Step 3: Cross multiply
    66,378.08x = 91,600.68 × 36,163.78
  4. Step 4: Simplify right side
    66,378.08x = 3,312,626,839.37
  5. Step 5: Solve for x
    x = 3,312,626,839.37/66,378.08
  6. Step 6: Final answer
    x = 49,905.43

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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.