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Finding the Fourth Proportional to 65,852,844.60, 98,779,266.90 and 20,419,231.80

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Solution

The fourth proportional to 65,852,844.60, 98,779,266.90 and 20,419,231.80 is: 30,628,847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,852,844.60 : 98,779,266.90 = 20,419,231.80 : x
  2. Step 2: Convert to fraction form
    65,852,844.60/98,779,266.90 = 20,419,231.80/x
  3. Step 3: Cross multiply
    65,852,844.60x = 98,779,266.90 × 20,419,231.80
  4. Step 4: Simplify right side
    65,852,844.60x = 2,016,996,747,865,167.50
  5. Step 5: Solve for x
    x = 2,016,996,747,865,167.50/65,852,844.60
  6. Step 6: Final answer
    x = 30,628,847.70

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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.