Finding the Fourth Proportional to 221,030.25, 305,021.75 and 120,428.25
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Solution
The fourth proportional to 221,030.25, 305,021.75 and 120,428.25 is: 166,190.99
Step by Step Solution
- Step 1: Write the proportion equation
221,030.25 : 305,021.75 = 120,428.25 : x - Step 2: Convert to fraction form
221,030.25/305,021.75 = 120,428.25/x - Step 3: Cross multiply
221,030.25x = 305,021.75 × 120,428.25 - Step 4: Simplify right side
221,030.25x = 36,733,234,962.30 - Step 5: Solve for x
x = 36,733,234,962.30/221,030.25 - Step 6: Final answer
x = 166,190.99
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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.