Finding the Fourth Proportional to 128,388.14, 192,627.79 and 57,304.31
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Solution
The fourth proportional to 128,388.14, 192,627.79 and 57,304.31 is: 85,976.80
Step by Step Solution
- Step 1: Write the proportion equation
128,388.14 : 192,627.79 = 57,304.31 : x - Step 2: Convert to fraction form
128,388.14/192,627.79 = 57,304.31/x - Step 3: Cross multiply
128,388.14x = 192,627.79 × 57,304.31 - Step 4: Simplify right side
128,388.14x = 11,038,401,486.38 - Step 5: Solve for x
x = 11,038,401,486.38/128,388.14 - Step 6: Final answer
x = 85,976.80
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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.