Finding the Fourth Proportional to 138,497.40, 191,165.62 and 81,928.44
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Solution
The fourth proportional to 138,497.40, 191,165.62 and 81,928.44 is: 113,084.44
Step by Step Solution
- Step 1: Write the proportion equation
138,497.40 : 191,165.62 = 81,928.44 : x - Step 2: Convert to fraction form
138,497.40/191,165.62 = 81,928.44/x - Step 3: Cross multiply
138,497.40x = 191,165.62 × 81,928.44 - Step 4: Simplify right side
138,497.40x = 15,661,901,028.23 - Step 5: Solve for x
x = 15,661,901,028.23/138,497.40 - Step 6: Final answer
x = 113,084.44
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1.5x scale
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.