Finding the Fourth Proportional to 221,763.20, 306,023.68 and 121,161.60
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Solution
The fourth proportional to 221,763.20, 306,023.68 and 121,161.60 is: 167,197.80
Step by Step Solution
- Step 1: Write the proportion equation
221,763.20 : 306,023.68 = 121,161.60 : x - Step 2: Convert to fraction form
221,763.20/306,023.68 = 121,161.60/x - Step 3: Cross multiply
221,763.20x = 306,023.68 × 121,161.60 - Step 4: Simplify right side
221,763.20x = 37,078,318,706.69 - Step 5: Solve for x
x = 37,078,318,706.69/221,763.20 - Step 6: Final answer
x = 167,197.80
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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.