Finding the Fourth Proportional to 212,402.20, 318,617.70 and 72,171.40
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Solution
The fourth proportional to 212,402.20, 318,617.70 and 72,171.40 is: 108,261.99
Step by Step Solution
- Step 1: Write the proportion equation
212,402.20 : 318,617.70 = 72,171.40 : x - Step 2: Convert to fraction form
212,402.20/318,617.70 = 72,171.40/x - Step 3: Cross multiply
212,402.20x = 318,617.70 × 72,171.40 - Step 4: Simplify right side
212,402.20x = 22,995,085,473.78 - Step 5: Solve for x
x = 22,995,085,473.78/212,402.20 - Step 6: Final answer
x = 108,261.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.