Finding the Fourth Proportional to 138,405.57, 189,753.88 and 135,883.23
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Solution
The fourth proportional to 138,405.57, 189,753.88 and 135,883.23 is: 186,295.75
Step by Step Solution
- Step 1: Write the proportion equation
138,405.57 : 189,753.88 = 135,883.23 : x - Step 2: Convert to fraction form
138,405.57/189,753.88 = 135,883.23/x - Step 3: Cross multiply
138,405.57x = 189,753.88 × 135,883.23 - Step 4: Simplify right side
138,405.57x = 25,784,370,119.43 - Step 5: Solve for x
x = 25,784,370,119.43/138,405.57 - Step 6: Final answer
x = 186,295.75
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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.