Finding the Fourth Proportional to 128,110.40, 192,165.60 and 121,986.80
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Solution
The fourth proportional to 128,110.40, 192,165.60 and 121,986.80 is: 182,980.20
Step by Step Solution
- Step 1: Write the proportion equation
128,110.40 : 192,165.60 = 121,986.80 : x - Step 2: Convert to fraction form
128,110.40/192,165.60 = 121,986.80/x - Step 3: Cross multiply
128,110.40x = 192,165.60 × 121,986.80 - Step 4: Simplify right side
128,110.40x = 23,441,666,614.08 - Step 5: Solve for x
x = 23,441,666,614.08/128,110.40 - Step 6: Final answer
x = 182,980.20
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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.