Finding the Fourth Proportional to 86,431.05, 129,664.80 and 27,272.70
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Solution
The fourth proportional to 86,431.05, 129,664.80 and 27,272.70 is: 40,914.80
Step by Step Solution
- Step 1: Write the proportion equation
86,431.05 : 129,664.80 = 27,272.70 : x - Step 2: Convert to fraction form
86,431.05/129,664.80 = 27,272.70/x - Step 3: Cross multiply
86,431.05x = 129,664.80 × 27,272.70 - Step 4: Simplify right side
86,431.05x = 3,536,309,190.96 - Step 5: Solve for x
x = 3,536,309,190.96/86,431.05 - Step 6: Final answer
x = 40,914.80
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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.