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Finding the Fourth Proportional to 66,651.20, 91,978.83 and 36,436.88

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Solution

The fourth proportional to 66,651.20, 91,978.83 and 36,436.88 is: 50,282.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,651.20 : 91,978.83 = 36,436.88 : x
  2. Step 2: Convert to fraction form
    66,651.20/91,978.83 = 36,436.88/x
  3. Step 3: Cross multiply
    66,651.20x = 91,978.83 × 36,436.88
  4. Step 4: Simplify right side
    66,651.20x = 3,351,421,591.25
  5. Step 5: Solve for x
    x = 3,351,421,591.25/66,651.20
  6. Step 6: Final answer
    x = 50,282.99

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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.