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Finding the Fourth Proportional to 66,433,223.80, 99,649,835.70 and 64,940,231.80

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Solution

The fourth proportional to 66,433,223.80, 99,649,835.70 and 64,940,231.80 is: 97,410,347.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,433,223.80 : 99,649,835.70 = 64,940,231.80 : x
  2. Step 2: Convert to fraction form
    66,433,223.80/99,649,835.70 = 64,940,231.80/x
  3. Step 3: Cross multiply
    66,433,223.80x = 99,649,835.70 × 64,940,231.80
  4. Step 4: Simplify right side
    66,433,223.80x = 6,471,283,429,189,915
  5. Step 5: Solve for x
    x = 6,471,283,429,189,915/66,433,223.80
  6. Step 6: Final answer
    x = 97,410,347.70

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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.