Finding the Fourth Proportional to 78,205.15, 107,917.68 and 44,215.26
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Solution
The fourth proportional to 78,205.15, 107,917.68 and 44,215.26 is: 61,013.99
Step by Step Solution
- Step 1: Write the proportion equation
78,205.15 : 107,917.68 = 44,215.26 : x - Step 2: Convert to fraction form
78,205.15/107,917.68 = 44,215.26/x - Step 3: Cross multiply
78,205.15x = 107,917.68 × 44,215.26 - Step 4: Simplify right side
78,205.15x = 4,771,608,279.80 - Step 5: Solve for x
x = 4,771,608,279.80/78,205.15 - Step 6: Final answer
x = 61,013.99
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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.