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Finding the Fourth Proportional to 66,440,919.40, 99,661,379.10 and 65,993,021.80

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Solution

The fourth proportional to 66,440,919.40, 99,661,379.10 and 65,993,021.80 is: 98,989,532.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440,919.40 : 99,661,379.10 = 65,993,021.80 : x
  2. Step 2: Convert to fraction form
    66,440,919.40/99,661,379.10 = 65,993,021.80/x
  3. Step 3: Cross multiply
    66,440,919.40x = 99,661,379.10 × 65,993,021.80
  4. Step 4: Simplify right side
    66,440,919.40x = 6,576,955,563,564,364
  5. Step 5: Solve for x
    x = 6,576,955,563,564,364/66,440,919.40
  6. Step 6: Final answer
    x = 98,989,532.70

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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.