Finding the Fourth Proportional to 138,217.13, 190,745.78 and 77,791.68
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Solution
The fourth proportional to 138,217.13, 190,745.78 and 77,791.68 is: 107,355.98
Step by Step Solution
- Step 1: Write the proportion equation
138,217.13 : 190,745.78 = 77,791.68 : x - Step 2: Convert to fraction form
138,217.13/190,745.78 = 77,791.68/x - Step 3: Cross multiply
138,217.13x = 190,745.78 × 77,791.68 - Step 4: Simplify right side
138,217.13x = 14,838,434,290.15 - Step 5: Solve for x
x = 14,838,434,290.15/138,217.13 - Step 6: Final answer
x = 107,355.98
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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.