Finding the Fourth Proportional to 66,419,859.60, 99,620,458.20 and 20,986,246.80
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Solution
The fourth proportional to 66,419,859.60, 99,620,458.20 and 20,986,246.80 is: 31,476,421.88
Step by Step Solution
- Step 1: Write the proportion equation
66,419,859.60 : 99,620,458.20 = 20,986,246.80 : x - Step 2: Convert to fraction form
66,419,859.60/99,620,458.20 = 20,986,246.80/x - Step 3: Cross multiply
66,419,859.60x = 99,620,458.20 × 20,986,246.80 - Step 4: Simplify right side
66,419,859.60x = 2,090,659,522,114,284 - Step 5: Solve for x
x = 2,090,659,522,114,284/66,419,859.60 - Step 6: Final answer
x = 31,476,421.88
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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.