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Finding the Fourth Proportional to 66,443,857.80, 99,665,786.70 and 57,356,216.70

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Solution

The fourth proportional to 66,443,857.80, 99,665,786.70 and 57,356,216.70 is: 86,034,325.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,443,857.80 : 99,665,786.70 = 57,356,216.70 : x
  2. Step 2: Convert to fraction form
    66,443,857.80/99,665,786.70 = 57,356,216.70/x
  3. Step 3: Cross multiply
    66,443,857.80x = 99,665,786.70 × 57,356,216.70
  4. Step 4: Simplify right side
    66,443,857.80x = 5,716,452,459,541,178
  5. Step 5: Solve for x
    x = 5,716,452,459,541,178/66,443,857.80
  6. Step 6: Final answer
    x = 86,034,325.05

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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.