Finding the Fourth Proportional to 136,621.90, 188,537.84 and 76,192.62
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Solution
The fourth proportional to 136,621.90, 188,537.84 and 76,192.62 is: 105,145.60
Step by Step Solution
- Step 1: Write the proportion equation
136,621.90 : 188,537.84 = 76,192.62 : x - Step 2: Convert to fraction form
136,621.90/188,537.84 = 76,192.62/x - Step 3: Cross multiply
136,621.90x = 188,537.84 × 76,192.62 - Step 4: Simplify right side
136,621.90x = 14,365,191,998.74 - Step 5: Solve for x
x = 14,365,191,998.74/136,621.90 - Step 6: Final answer
x = 105,145.60
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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.