Finding the Fourth Proportional to 76,902.48, 115,145.27 and 39,888.72
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Solution
The fourth proportional to 76,902.48, 115,145.27 and 39,888.72 is: 59,724.95
Step by Step Solution
- Step 1: Write the proportion equation
76,902.48 : 115,145.27 = 39,888.72 : x - Step 2: Convert to fraction form
76,902.48/115,145.27 = 39,888.72/x - Step 3: Cross multiply
76,902.48x = 115,145.27 × 39,888.72 - Step 4: Simplify right side
76,902.48x = 4,592,996,858.63 - Step 5: Solve for x
x = 4,592,996,858.63/76,902.48 - Step 6: Final answer
x = 59,724.95
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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.