Finding the Fourth Proportional to 121,157.80, 181,736.70 and 93,131.80
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Solution
The fourth proportional to 121,157.80, 181,736.70 and 93,131.80 is: 139,697.70
Step by Step Solution
- Step 1: Write the proportion equation
121,157.80 : 181,736.70 = 93,131.80 : x - Step 2: Convert to fraction form
121,157.80/181,736.70 = 93,131.80/x - Step 3: Cross multiply
121,157.80x = 181,736.70 × 93,131.80 - Step 4: Simplify right side
121,157.80x = 16,925,465,997.06 - Step 5: Solve for x
x = 16,925,465,997.06/121,157.80 - Step 6: Final answer
x = 139,697.70
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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.