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Finding the Fourth Proportional to 66,940,643.70, 100,410,965.55 and 45,257,850.90

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Solution

The fourth proportional to 66,940,643.70, 100,410,965.55 and 45,257,850.90 is: 67,886,776.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,940,643.70 : 100,410,965.55 = 45,257,850.90 : x
  2. Step 2: Convert to fraction form
    66,940,643.70/100,410,965.55 = 45,257,850.90/x
  3. Step 3: Cross multiply
    66,940,643.70x = 100,410,965.55 × 45,257,850.90
  4. Step 4: Simplify right side
    66,940,643.70x = 4,544,384,507,586,936
  5. Step 5: Solve for x
    x = 4,544,384,507,586,936/66,940,643.70
  6. Step 6: Final answer
    x = 67,886,776.35

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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.