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Finding the Fourth Proportional to 66,422.87, 99,692.79 and 34,855.48

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Solution

The fourth proportional to 66,422.87, 99,692.79 and 34,855.48 is: 52,313.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.87 : 99,692.79 = 34,855.48 : x
  2. Step 2: Convert to fraction form
    66,422.87/99,692.79 = 34,855.48/x
  3. Step 3: Cross multiply
    66,422.87x = 99,692.79 × 34,855.48
  4. Step 4: Simplify right side
    66,422.87x = 3,474,839,375.25
  5. Step 5: Solve for x
    x = 3,474,839,375.25/66,422.87
  6. Step 6: Final answer
    x = 52,313.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.