Finding the Fourth Proportional to 138,486.80, 207,656.37 and 71,859.84
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Solution
The fourth proportional to 138,486.80, 207,656.37 and 71,859.84 is: 107,751.45
Step by Step Solution
- Step 1: Write the proportion equation
138,486.80 : 207,656.37 = 71,859.84 : x - Step 2: Convert to fraction form
138,486.80/207,656.37 = 71,859.84/x - Step 3: Cross multiply
138,486.80x = 207,656.37 × 71,859.84 - Step 4: Simplify right side
138,486.80x = 14,922,153,523.18 - Step 5: Solve for x
x = 14,922,153,523.18/138,486.80 - Step 6: Final answer
x = 107,751.45
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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.