Finding the Fourth Proportional to 128,346.40, 192,433.20 and 65,965.60
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Solution
The fourth proportional to 128,346.40, 192,433.20 and 65,965.60 is: 98,903.99
Step by Step Solution
- Step 1: Write the proportion equation
128,346.40 : 192,433.20 = 65,965.60 : x - Step 2: Convert to fraction form
128,346.40/192,433.20 = 65,965.60/x - Step 3: Cross multiply
128,346.40x = 192,433.20 × 65,965.60 - Step 4: Simplify right side
128,346.40x = 12,693,971,497.92 - Step 5: Solve for x
x = 12,693,971,497.92/128,346.40 - Step 6: Final answer
x = 98,903.99
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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.