Home / 80,861,389.20-121,209,415.20-39,857,763.60

Finding the Fourth Proportional to 80,861,389.20, 121,209,415.20 and 39,857,763.60

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Solution

The fourth proportional to 80,861,389.20, 121,209,415.20 and 39,857,763.60 is: 59,745,896.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861,389.20 : 121,209,415.20 = 39,857,763.60 : x
  2. Step 2: Convert to fraction form
    80,861,389.20/121,209,415.20 = 39,857,763.60/x
  3. Step 3: Cross multiply
    80,861,389.20x = 121,209,415.20 × 39,857,763.60
  4. Step 4: Simplify right side
    80,861,389.20x = 4,831,136,217,135,847
  5. Step 5: Solve for x
    x = 4,831,136,217,135,847/80,861,389.20
  6. Step 6: Final answer
    x = 59,745,896.84

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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.