Finding the Fourth Proportional to 156,129.36, 215,450.38 and 91,589.62
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Solution
The fourth proportional to 156,129.36, 215,450.38 and 91,589.62 is: 126,388.90
Step by Step Solution
- Step 1: Write the proportion equation
156,129.36 : 215,450.38 = 91,589.62 : x - Step 2: Convert to fraction form
156,129.36/215,450.38 = 91,589.62/x - Step 3: Cross multiply
156,129.36x = 215,450.38 × 91,589.62 - Step 4: Simplify right side
156,129.36x = 19,733,018,433.06 - Step 5: Solve for x
x = 19,733,018,433.06/156,129.36 - Step 6: Final answer
x = 126,388.90
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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.