Finding the Fourth Proportional to 138,021.40, 206,513.70 and 125,579.80
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Solution
The fourth proportional to 138,021.40, 206,513.70 and 125,579.80 is: 187,898.03
Step by Step Solution
- Step 1: Write the proportion equation
138,021.40 : 206,513.70 = 125,579.80 : x - Step 2: Convert to fraction form
138,021.40/206,513.70 = 125,579.80/x - Step 3: Cross multiply
138,021.40x = 206,513.70 × 125,579.80 - Step 4: Simplify right side
138,021.40x = 25,933,949,143.26 - Step 5: Solve for x
x = 25,933,949,143.26/138,021.40 - Step 6: Final answer
x = 187,898.03
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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.