Finding the Fourth Proportional to 139,623.51, 207,855.99 and 138,793.13
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Solution
The fourth proportional to 139,623.51, 207,855.99 and 138,793.13 is: 206,619.80
Step by Step Solution
- Step 1: Write the proportion equation
139,623.51 : 207,855.99 = 138,793.13 : x - Step 2: Convert to fraction form
139,623.51/207,855.99 = 138,793.13/x - Step 3: Cross multiply
139,623.51x = 207,855.99 × 138,793.13 - Step 4: Simplify right side
139,623.51x = 28,848,982,402.07 - Step 5: Solve for x
x = 28,848,982,402.07/139,623.51 - Step 6: Final answer
x = 206,619.80
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.