Finding the Fourth Proportional to 100,198.16, 138,286.25 and 57,756.99
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Solution
The fourth proportional to 100,198.16, 138,286.25 and 57,756.99 is: 79,712.02
Step by Step Solution
- Step 1: Write the proportion equation
100,198.16 : 138,286.25 = 57,756.99 : x - Step 2: Convert to fraction form
100,198.16/138,286.25 = 57,756.99/x - Step 3: Cross multiply
100,198.16x = 138,286.25 × 57,756.99 - Step 4: Simplify right side
100,198.16x = 7,986,997,269.60 - Step 5: Solve for x
x = 7,986,997,269.60/100,198.16 - Step 6: Final answer
x = 79,712.02
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.