Home / 80,861,408.20-121,209,443.70-39,857,782.60

Finding the Fourth Proportional to 80,861,408.20, 121,209,443.70 and 39,857,782.60

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Solution

The fourth proportional to 80,861,408.20, 121,209,443.70 and 39,857,782.60 is: 59,745,925.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861,408.20 : 121,209,443.70 = 39,857,782.60 : x
  2. Step 2: Convert to fraction form
    80,861,408.20/121,209,443.70 = 39,857,782.60/x
  3. Step 3: Cross multiply
    80,861,408.20x = 121,209,443.70 × 39,857,782.60
  4. Step 4: Simplify right side
    80,861,408.20x = 4,831,139,656,061,540
  5. Step 5: Solve for x
    x = 4,831,139,656,061,540/80,861,408.20
  6. Step 6: Final answer
    x = 59,745,925.33

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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.