Finding the Fourth Proportional to 149,138.21, 205,812.90 and 81,157.14
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Solution
The fourth proportional to 149,138.21, 205,812.90 and 81,157.14 is: 111,998.03
Step by Step Solution
- Step 1: Write the proportion equation
149,138.21 : 205,812.90 = 81,157.14 : x - Step 2: Convert to fraction form
149,138.21/205,812.90 = 81,157.14/x - Step 3: Cross multiply
149,138.21x = 205,812.90 × 81,157.14 - Step 4: Simplify right side
149,138.21x = 16,703,186,339.11 - Step 5: Solve for x
x = 16,703,186,339.11/149,138.21 - Step 6: Final answer
x = 111,998.03
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.