Finding the Fourth Proportional to 78,481.21, 116,982.49 and 72,182.65
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Solution
The fourth proportional to 78,481.21, 116,982.49 and 72,182.65 is: 107,593.99
Step by Step Solution
- Step 1: Write the proportion equation
78,481.21 : 116,982.49 = 72,182.65 : x - Step 2: Convert to fraction form
78,481.21/116,982.49 = 72,182.65/x - Step 3: Cross multiply
78,481.21x = 116,982.49 × 72,182.65 - Step 4: Simplify right side
78,481.21x = 8,444,106,131.80 - Step 5: Solve for x
x = 8,444,106,131.80/78,481.21 - Step 6: Final answer
x = 107,593.99
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.