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Finding the Fourth Proportional to 7,193,455.81, 9,926,851.71 and 3,930,200.31

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Solution

The fourth proportional to 7,193,455.81, 9,926,851.71 and 3,930,200.31 is: 5,423,612.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,193,455.81 : 9,926,851.71 = 3,930,200.31 : x
  2. Step 2: Convert to fraction form
    7,193,455.81/9,926,851.71 = 3,930,200.31/x
  3. Step 3: Cross multiply
    7,193,455.81x = 9,926,851.71 × 3,930,200.31
  4. Step 4: Simplify right side
    7,193,455.81x = 39,014,515,618,331.77
  5. Step 5: Solve for x
    x = 39,014,515,618,331.77/7,193,455.81
  6. Step 6: Final answer
    x = 5,423,612.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.