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Finding the Fourth Proportional to 65,858,793.60, 98,788,190.40 and 20,425,180.80

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Solution

The fourth proportional to 65,858,793.60, 98,788,190.40 and 20,425,180.80 is: 30,637,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,858,793.60 : 98,788,190.40 = 20,425,180.80 : x
  2. Step 2: Convert to fraction form
    65,858,793.60/98,788,190.40 = 20,425,180.80/x
  3. Step 3: Cross multiply
    65,858,793.60x = 98,788,190.40 × 20,425,180.80
  4. Step 4: Simplify right side
    65,858,793.60x = 2,017,766,649,824,824.50
  5. Step 5: Solve for x
    x = 2,017,766,649,824,824.50/65,858,793.60
  6. Step 6: Final answer
    x = 30,637,771.20

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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.