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Finding the Fourth Proportional to 66,173,080.60, 99,259,620.90 and 20,114,860.60

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Solution

The fourth proportional to 66,173,080.60, 99,259,620.90 and 20,114,860.60 is: 30,172,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,173,080.60 : 99,259,620.90 = 20,114,860.60 : x
  2. Step 2: Convert to fraction form
    66,173,080.60/99,259,620.90 = 20,114,860.60/x
  3. Step 3: Cross multiply
    66,173,080.60x = 99,259,620.90 × 20,114,860.60
  4. Step 4: Simplify right side
    66,173,080.60x = 1,996,593,437,612,346.75
  5. Step 5: Solve for x
    x = 1,996,593,437,612,346.75/66,173,080.60
  6. Step 6: Final answer
    x = 30,172,290.90

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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.