Finding the Fourth Proportional to 83,659,615.80, 125,489,423.70 and 77,990,911.80
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Solution
The fourth proportional to 83,659,615.80, 125,489,423.70 and 77,990,911.80 is: 116,986,367.70
Step by Step Solution
- Step 1: Write the proportion equation
83,659,615.80 : 125,489,423.70 = 77,990,911.80 : x - Step 2: Convert to fraction form
83,659,615.80/125,489,423.70 = 77,990,911.80/x - Step 3: Cross multiply
83,659,615.80x = 125,489,423.70 × 77,990,911.80 - Step 4: Simplify right side
83,659,615.80x = 9,787,034,575,619,530 - Step 5: Solve for x
x = 9,787,034,575,619,530/83,659,615.80 - Step 6: Final answer
x = 116,986,367.70
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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.