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Finding the Fourth Proportional to 61,196,337.20, 91,794,505.80 and 20,806,821.20

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Solution

The fourth proportional to 61,196,337.20, 91,794,505.80 and 20,806,821.20 is: 31,210,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,196,337.20 : 91,794,505.80 = 20,806,821.20 : x
  2. Step 2: Convert to fraction form
    61,196,337.20/91,794,505.80 = 20,806,821.20/x
  3. Step 3: Cross multiply
    61,196,337.20x = 91,794,505.80 × 20,806,821.20
  4. Step 4: Simplify right side
    61,196,337.20x = 1,909,951,869,322,962.75
  5. Step 5: Solve for x
    x = 1,909,951,869,322,962.75/61,196,337.20
  6. Step 6: Final answer
    x = 31,210,231.80

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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.