Finding the Fourth Proportional to 221,614.18, 305,828.13 and 121,012.18
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Solution
The fourth proportional to 221,614.18, 305,828.13 and 121,012.18 is: 166,997.12
Step by Step Solution
- Step 1: Write the proportion equation
221,614.18 : 305,828.13 = 121,012.18 : x - Step 2: Convert to fraction form
221,614.18/305,828.13 = 121,012.18/x - Step 3: Cross multiply
221,614.18x = 305,828.13 × 121,012.18 - Step 4: Simplify right side
221,614.18x = 37,008,928,716.62 - Step 5: Solve for x
x = 37,008,928,716.62/221,614.18 - Step 6: Final answer
x = 166,997.12
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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.