Finding the Fourth Proportional to 100,329.14, 138,455.77 and 55,011.26
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Solution
The fourth proportional to 100,329.14, 138,455.77 and 55,011.26 is: 75,916.39
Step by Step Solution
- Step 1: Write the proportion equation
100,329.14 : 138,455.77 = 55,011.26 : x - Step 2: Convert to fraction form
100,329.14/138,455.77 = 55,011.26/x - Step 3: Cross multiply
100,329.14x = 138,455.77 × 55,011.26 - Step 4: Simplify right side
100,329.14x = 7,616,626,361.97 - Step 5: Solve for x
x = 7,616,626,361.97/100,329.14 - Step 6: Final answer
x = 75,916.39
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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.