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Finding the Fourth Proportional to 61,078,809.20, 91,618,213.80 and 61,078,809.20

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Solution

The fourth proportional to 61,078,809.20, 91,618,213.80 and 61,078,809.20 is: 91,618,213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,078,809.20 : 91,618,213.80 = 61,078,809.20 : x
  2. Step 2: Convert to fraction form
    61,078,809.20/91,618,213.80 = 61,078,809.20/x
  3. Step 3: Cross multiply
    61,078,809.20x = 91,618,213.80 × 61,078,809.20
  4. Step 4: Simplify right side
    61,078,809.20x = 5,595,931,399,935,007
  5. Step 5: Solve for x
    x = 5,595,931,399,935,007/61,078,809.20
  6. Step 6: Final answer
    x = 91,618,213.80

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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.