Finding the Fourth Proportional to 138,430.38, 191,035.71 and 81,841.26
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Solution
The fourth proportional to 138,430.38, 191,035.71 and 81,841.26 is: 112,941.99
Step by Step Solution
- Step 1: Write the proportion equation
138,430.38 : 191,035.71 = 81,841.26 : x - Step 2: Convert to fraction form
138,430.38/191,035.71 = 81,841.26/x - Step 3: Cross multiply
138,430.38x = 191,035.71 × 81,841.26 - Step 4: Simplify right side
138,430.38x = 15,634,603,211.39 - Step 5: Solve for x
x = 15,634,603,211.39/138,430.38 - Step 6: Final answer
x = 112,941.99
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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.