Finding the Fourth Proportional to 138,314.80, 207,472.20 and 85,170.70
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Solution
The fourth proportional to 138,314.80, 207,472.20 and 85,170.70 is: 127,756.05
Step by Step Solution
- Step 1: Write the proportion equation
138,314.80 : 207,472.20 = 85,170.70 : x - Step 2: Convert to fraction form
138,314.80/207,472.20 = 85,170.70/x - Step 3: Cross multiply
138,314.80x = 207,472.20 × 85,170.70 - Step 4: Simplify right side
138,314.80x = 17,670,552,504.54 - Step 5: Solve for x
x = 17,670,552,504.54/138,314.80 - Step 6: Final answer
x = 127,756.05
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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.