Finding the Fourth Proportional to 138,412.80, 207,442.62 and 71,723.88
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Solution
The fourth proportional to 138,412.80, 207,442.62 and 71,723.88 is: 107,494.32
Step by Step Solution
- Step 1: Write the proportion equation
138,412.80 : 207,442.62 = 71,723.88 : x - Step 2: Convert to fraction form
138,412.80/207,442.62 = 71,723.88/x - Step 3: Cross multiply
138,412.80x = 207,442.62 × 71,723.88 - Step 4: Simplify right side
138,412.80x = 14,878,589,583.77 - Step 5: Solve for x
x = 14,878,589,583.77/138,412.80 - Step 6: Final answer
x = 107,494.32
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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.