Finding the Fourth Proportional to 81,042.21, 121,583.70 and 57,396.06
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Solution
The fourth proportional to 81,042.21, 121,583.70 and 57,396.06 is: 86,108.53
Step by Step Solution
- Step 1: Write the proportion equation
81,042.21 : 121,583.70 = 57,396.06 : x - Step 2: Convert to fraction form
81,042.21/121,583.70 = 57,396.06/x - Step 3: Cross multiply
81,042.21x = 121,583.70 × 57,396.06 - Step 4: Simplify right side
81,042.21x = 6,978,425,340.22 - Step 5: Solve for x
x = 6,978,425,340.22/81,042.21 - Step 6: Final answer
x = 86,108.53
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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.