Finding the Fourth Proportional to 128,272.62, 192,233.97 and 78,370.14
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Solution
The fourth proportional to 128,272.62, 192,233.97 and 78,370.14 is: 117,448.32
Step by Step Solution
- Step 1: Write the proportion equation
128,272.62 : 192,233.97 = 78,370.14 : x - Step 2: Convert to fraction form
128,272.62/192,233.97 = 78,370.14/x - Step 3: Cross multiply
128,272.62x = 192,233.97 × 78,370.14 - Step 4: Simplify right side
128,272.62x = 15,065,403,141.66 - Step 5: Solve for x
x = 15,065,403,141.66/128,272.62 - Step 6: Final answer
x = 117,448.32
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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.