Finding the Fourth Proportional to 77,142.67, 115,728.60 and 27,217.10
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Solution
The fourth proportional to 77,142.67, 115,728.60 and 27,217.10 is: 40,830.80
Step by Step Solution
- Step 1: Write the proportion equation
77,142.67 : 115,728.60 = 27,217.10 : x - Step 2: Convert to fraction form
77,142.67/115,728.60 = 27,217.10/x - Step 3: Cross multiply
77,142.67x = 115,728.60 × 27,217.10 - Step 4: Simplify right side
77,142.67x = 3,149,796,879.06 - Step 5: Solve for x
x = 3,149,796,879.06/77,142.67 - Step 6: Final answer
x = 40,830.80
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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.