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Finding the Fourth Proportional to 6,659,927.10, 9,989,890.65 and 6,659,927.10

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Solution

The fourth proportional to 6,659,927.10, 9,989,890.65 and 6,659,927.10 is: 9,989,890.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,659,927.10 : 9,989,890.65 = 6,659,927.10 : x
  2. Step 2: Convert to fraction form
    6,659,927.10/9,989,890.65 = 6,659,927.10/x
  3. Step 3: Cross multiply
    6,659,927.10x = 9,989,890.65 × 6,659,927.10
  4. Step 4: Simplify right side
    6,659,927.10x = 66,531,943,465,971.62
  5. Step 5: Solve for x
    x = 66,531,943,465,971.62/6,659,927.10
  6. Step 6: Final answer
    x = 9,989,890.65

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Double scale
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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.