Finding the Fourth Proportional to 138,546.19, 191,193.69 and 74,883.98
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Solution
The fourth proportional to 138,546.19, 191,193.69 and 74,883.98 is: 103,339.87
Step by Step Solution
- Step 1: Write the proportion equation
138,546.19 : 191,193.69 = 74,883.98 : x - Step 2: Convert to fraction form
138,546.19/191,193.69 = 74,883.98/x - Step 3: Cross multiply
138,546.19x = 191,193.69 × 74,883.98 - Step 4: Simplify right side
138,546.19x = 14,317,344,936.07 - Step 5: Solve for x
x = 14,317,344,936.07/138,546.19 - Step 6: Final answer
x = 103,339.87
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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.