Finding the Fourth Proportional to 77,075.75, 115,613.67 and 21,671.75
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Solution
The fourth proportional to 77,075.75, 115,613.67 and 21,671.75 is: 32,507.64
Step by Step Solution
- Step 1: Write the proportion equation
77,075.75 : 115,613.67 = 21,671.75 : x - Step 2: Convert to fraction form
77,075.75/115,613.67 = 21,671.75/x - Step 3: Cross multiply
77,075.75x = 115,613.67 × 21,671.75 - Step 4: Simplify right side
77,075.75x = 2,505,550,552.82 - Step 5: Solve for x
x = 2,505,550,552.82/77,075.75 - Step 6: Final answer
x = 32,507.64
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1.5x scale
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.