Finding the Fourth Proportional to 138,825.36, 191,579.12 and 75,163.20
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Solution
The fourth proportional to 138,825.36, 191,579.12 and 75,163.20 is: 103,725.28
Step by Step Solution
- Step 1: Write the proportion equation
138,825.36 : 191,579.12 = 75,163.20 : x - Step 2: Convert to fraction form
138,825.36/191,579.12 = 75,163.20/x - Step 3: Cross multiply
138,825.36x = 191,579.12 × 75,163.20 - Step 4: Simplify right side
138,825.36x = 14,399,699,712.38 - Step 5: Solve for x
x = 14,399,699,712.38/138,825.36 - Step 6: Final answer
x = 103,725.28
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.