Finding the Fourth Proportional to 151,987.07, 209,771.07 and 100,213.09
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Solution
The fourth proportional to 151,987.07, 209,771.07 and 100,213.09 is: 138,313.12
Step by Step Solution
- Step 1: Write the proportion equation
151,987.07 : 209,771.07 = 100,213.09 : x - Step 2: Convert to fraction form
151,987.07/209,771.07 = 100,213.09/x - Step 3: Cross multiply
151,987.07x = 209,771.07 × 100,213.09 - Step 4: Simplify right side
151,987.07x = 21,021,806,592.88 - Step 5: Solve for x
x = 21,021,806,592.88/151,987.07 - Step 6: Final answer
x = 138,313.12
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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.