Finding the Fourth Proportional to 138,638.70, 207,927.33 and 38,772.06
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Solution
The fourth proportional to 138,638.70, 207,927.33 and 38,772.06 is: 58,149.50
Step by Step Solution
- Step 1: Write the proportion equation
138,638.70 : 207,927.33 = 38,772.06 : x - Step 2: Convert to fraction form
138,638.70/207,927.33 = 38,772.06/x - Step 3: Cross multiply
138,638.70x = 207,927.33 × 38,772.06 - Step 4: Simplify right side
138,638.70x = 8,061,770,914.40 - Step 5: Solve for x
x = 8,061,770,914.40/138,638.70 - Step 6: Final answer
x = 58,149.50
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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.