Finding the Fourth Proportional to 128,407.24, 192,540.30 and 39,636.28
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Solution
The fourth proportional to 128,407.24, 192,540.30 and 39,636.28 is: 59,432.64
Step by Step Solution
- Step 1: Write the proportion equation
128,407.24 : 192,540.30 = 39,636.28 : x - Step 2: Convert to fraction form
128,407.24/192,540.30 = 39,636.28/x - Step 3: Cross multiply
128,407.24x = 192,540.30 × 39,636.28 - Step 4: Simplify right side
128,407.24x = 7,631,581,242.08 - Step 5: Solve for x
x = 7,631,581,242.08/128,407.24 - Step 6: Final answer
x = 59,432.64
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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.