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Finding the Fourth Proportional to 66,936,812.60, 100,405,218.90 and 46,529,478.20

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Solution

The fourth proportional to 66,936,812.60, 100,405,218.90 and 46,529,478.20 is: 69,794,217.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,936,812.60 : 100,405,218.90 = 46,529,478.20 : x
  2. Step 2: Convert to fraction form
    66,936,812.60/100,405,218.90 = 46,529,478.20/x
  3. Step 3: Cross multiply
    66,936,812.60x = 100,405,218.90 × 46,529,478.20
  4. Step 4: Simplify right side
    66,936,812.60x = 4,671,802,443,973,779
  5. Step 5: Solve for x
    x = 4,671,802,443,973,779/66,936,812.60
  6. Step 6: Final answer
    x = 69,794,217.30

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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.