Finding the Fourth Proportional to 81,872.88, 122,170.80 and 73,047.12
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Solution
The fourth proportional to 81,872.88, 122,170.80 and 73,047.12 is: 109,000.99
Step by Step Solution
- Step 1: Write the proportion equation
81,872.88 : 122,170.80 = 73,047.12 : x - Step 2: Convert to fraction form
81,872.88/122,170.80 = 73,047.12/x - Step 3: Cross multiply
81,872.88x = 122,170.80 × 73,047.12 - Step 4: Simplify right side
81,872.88x = 8,924,225,088.10 - Step 5: Solve for x
x = 8,924,225,088.10/81,872.88 - Step 6: Final answer
x = 109,000.99
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.