Finding the Fourth Proportional to 89,694.20, 122,881.60 and 86,331.08
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Solution
The fourth proportional to 89,694.20, 122,881.60 and 86,331.08 is: 118,274.11
Step by Step Solution
- Step 1: Write the proportion equation
89,694.20 : 122,881.60 = 86,331.08 : x - Step 2: Convert to fraction form
89,694.20/122,881.60 = 86,331.08/x - Step 3: Cross multiply
89,694.20x = 122,881.60 × 86,331.08 - Step 4: Simplify right side
89,694.20x = 10,608,501,240.13 - Step 5: Solve for x
x = 10,608,501,240.13/89,694.20 - Step 6: Final answer
x = 118,274.11
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.