Finding the Fourth Proportional to 100,163.79, 138,220.77 and 54,833.09
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Solution
The fourth proportional to 100,163.79, 138,220.77 and 54,833.09 is: 75,666.78
Step by Step Solution
- Step 1: Write the proportion equation
100,163.79 : 138,220.77 = 54,833.09 : x - Step 2: Convert to fraction form
100,163.79/138,220.77 = 54,833.09/x - Step 3: Cross multiply
100,163.79x = 138,220.77 × 54,833.09 - Step 4: Simplify right side
100,163.79x = 7,579,071,230.18 - Step 5: Solve for x
x = 7,579,071,230.18/100,163.79 - Step 6: Final answer
x = 75,666.78
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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.