Finding the Fourth Proportional to 138,906.19, 191,690.55 and 75,243.99
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Solution
The fourth proportional to 138,906.19, 191,690.55 and 75,243.99 is: 103,836.71
Step by Step Solution
- Step 1: Write the proportion equation
138,906.19 : 191,690.55 = 75,243.99 : x - Step 2: Convert to fraction form
138,906.19/191,690.55 = 75,243.99/x - Step 3: Cross multiply
138,906.19x = 191,690.55 × 75,243.99 - Step 4: Simplify right side
138,906.19x = 14,423,561,827.29 - Step 5: Solve for x
x = 14,423,561,827.29/138,906.19 - Step 6: Final answer
x = 103,836.71
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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.