Finding the Fourth Proportional to 221,030.75, 305,022.44 and 120,428.75
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Solution
The fourth proportional to 221,030.75, 305,022.44 and 120,428.75 is: 166,191.68
Step by Step Solution
- Step 1: Write the proportion equation
221,030.75 : 305,022.44 = 120,428.75 : x - Step 2: Convert to fraction form
221,030.75/305,022.44 = 120,428.75/x - Step 3: Cross multiply
221,030.75x = 305,022.44 × 120,428.75 - Step 4: Simplify right side
221,030.75x = 36,733,470,569.01 - Step 5: Solve for x
x = 36,733,470,569.01/221,030.75 - Step 6: Final answer
x = 166,191.68
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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.