Finding the Fourth Proportional to 154,906.85, 213,754.11 and 86,909.68
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Solution
The fourth proportional to 154,906.85, 213,754.11 and 86,909.68 is: 119,925.63
Step by Step Solution
- Step 1: Write the proportion equation
154,906.85 : 213,754.11 = 86,909.68 : x - Step 2: Convert to fraction form
154,906.85/213,754.11 = 86,909.68/x - Step 3: Cross multiply
154,906.85x = 213,754.11 × 86,909.68 - Step 4: Simplify right side
154,906.85x = 18,577,301,240.07 - Step 5: Solve for x
x = 18,577,301,240.07/154,906.85 - Step 6: Final answer
x = 119,925.63
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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.