Finding the Fourth Proportional to 81,131.63, 121,697.74 and 25,727.63
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Solution
The fourth proportional to 81,131.63, 121,697.74 and 25,727.63 is: 38,591.53
Step by Step Solution
- Step 1: Write the proportion equation
81,131.63 : 121,697.74 = 25,727.63 : x - Step 2: Convert to fraction form
81,131.63/121,697.74 = 25,727.63/x - Step 3: Cross multiply
81,131.63x = 121,697.74 × 25,727.63 - Step 4: Simplify right side
81,131.63x = 3,130,993,850.23 - Step 5: Solve for x
x = 3,130,993,850.23/81,131.63 - Step 6: Final answer
x = 38,591.53
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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.