Finding the Fourth Proportional to 221,988.20, 306,334.68 and 126,486.80
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Solution
The fourth proportional to 221,988.20, 306,334.68 and 126,486.80 is: 174,546.64
Step by Step Solution
- Step 1: Write the proportion equation
221,988.20 : 306,334.68 = 126,486.80 : x - Step 2: Convert to fraction form
221,988.20/306,334.68 = 126,486.80/x - Step 3: Cross multiply
221,988.20x = 306,334.68 × 126,486.80 - Step 4: Simplify right side
221,988.20x = 38,747,293,402.22 - Step 5: Solve for x
x = 38,747,293,402.22/221,988.20 - Step 6: Final answer
x = 174,546.64
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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.