Finding the Fourth Proportional to 138,202.44, 190,729.05 and 77,778.90
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Solution
The fourth proportional to 138,202.44, 190,729.05 and 77,778.90 is: 107,340.33
Step by Step Solution
- Step 1: Write the proportion equation
138,202.44 : 190,729.05 = 77,778.90 : x - Step 2: Convert to fraction form
138,202.44/190,729.05 = 77,778.90/x - Step 3: Cross multiply
138,202.44x = 190,729.05 × 77,778.90 - Step 4: Simplify right side
138,202.44x = 14,834,695,707.05 - Step 5: Solve for x
x = 14,834,695,707.05/138,202.44 - Step 6: Final answer
x = 107,340.33
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.