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Finding the Fourth Proportional to 74,892,820.80, 112,339,231.20 and 66,233,467.20

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Solution

The fourth proportional to 74,892,820.80, 112,339,231.20 and 66,233,467.20 is: 99,350,200.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,892,820.80 : 112,339,231.20 = 66,233,467.20 : x
  2. Step 2: Convert to fraction form
    74,892,820.80/112,339,231.20 = 66,233,467.20/x
  3. Step 3: Cross multiply
    74,892,820.80x = 112,339,231.20 × 66,233,467.20
  4. Step 4: Simplify right side
    74,892,820.80x = 7,440,616,784,958,417
  5. Step 5: Solve for x
    x = 7,440,616,784,958,417/74,892,820.80
  6. Step 6: Final answer
    x = 99,350,200.80

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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.