Finding the Fourth Proportional to 98,578.38, 135,987.63 and 66,736.14
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Solution
The fourth proportional to 98,578.38, 135,987.63 and 66,736.14 is: 92,061.66
Step by Step Solution
- Step 1: Write the proportion equation
98,578.38 : 135,987.63 = 66,736.14 : x - Step 2: Convert to fraction form
98,578.38/135,987.63 = 66,736.14/x - Step 3: Cross multiply
98,578.38x = 135,987.63 × 66,736.14 - Step 4: Simplify right side
98,578.38x = 9,075,289,513.95 - Step 5: Solve for x
x = 9,075,289,513.95/98,578.38 - Step 6: Final answer
x = 92,061.66
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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.