Finding the Fourth Proportional to 84,047.12, 126,229.08 and 77,112.08
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Solution
The fourth proportional to 84,047.12, 126,229.08 and 77,112.08 is: 115,813.45
Step by Step Solution
- Step 1: Write the proportion equation
84,047.12 : 126,229.08 = 77,112.08 : x - Step 2: Convert to fraction form
84,047.12/126,229.08 = 77,112.08/x - Step 3: Cross multiply
84,047.12x = 126,229.08 × 77,112.08 - Step 4: Simplify right side
84,047.12x = 9,733,786,915.29 - Step 5: Solve for x
x = 9,733,786,915.29/84,047.12 - Step 6: Final answer
x = 115,813.45
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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.