Finding the Fourth Proportional to 206,845.28, 285,463.68 and 121,978.88
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Solution
The fourth proportional to 206,845.28, 285,463.68 and 121,978.88 is: 168,340.99
Step by Step Solution
- Step 1: Write the proportion equation
206,845.28 : 285,463.68 = 121,978.88 : x - Step 2: Convert to fraction form
206,845.28/285,463.68 = 121,978.88/x - Step 3: Cross multiply
206,845.28x = 285,463.68 × 121,978.88 - Step 4: Simplify right side
206,845.28x = 34,820,539,967.08 - Step 5: Solve for x
x = 34,820,539,967.08/206,845.28 - Step 6: Final answer
x = 168,340.99
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1.5x scale
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.