Finding the Fourth Proportional to 81,214.40, 121,844.64 and 49,229.12
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Solution
The fourth proportional to 81,214.40, 121,844.64 and 49,229.12 is: 73,857.65
Step by Step Solution
- Step 1: Write the proportion equation
81,214.40 : 121,844.64 = 49,229.12 : x - Step 2: Convert to fraction form
81,214.40/121,844.64 = 49,229.12/x - Step 3: Cross multiply
81,214.40x = 121,844.64 × 49,229.12 - Step 4: Simplify right side
81,214.40x = 5,998,304,403.92 - Step 5: Solve for x
x = 5,998,304,403.92/81,214.40 - Step 6: Final answer
x = 73,857.65
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.