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Finding the Fourth Proportional to 80,993,739.40, 121,490,609.10 and 20,409,465.40

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Solution

The fourth proportional to 80,993,739.40, 121,490,609.10 and 20,409,465.40 is: 30,614,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,993,739.40 : 121,490,609.10 = 20,409,465.40 : x
  2. Step 2: Convert to fraction form
    80,993,739.40/121,490,609.10 = 20,409,465.40/x
  3. Step 3: Cross multiply
    80,993,739.40x = 121,490,609.10 × 20,409,465.40
  4. Step 4: Simplify right side
    80,993,739.40x = 2,479,558,382,851,375
  5. Step 5: Solve for x
    x = 2,479,558,382,851,375/80,993,739.40
  6. Step 6: Final answer
    x = 30,614,198.10

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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.