Finding the Fourth Proportional to 81,864.29, 112,912.26 and 56,378.75
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Solution
The fourth proportional to 81,864.29, 112,912.26 and 56,378.75 is: 77,761.03
Step by Step Solution
- Step 1: Write the proportion equation
81,864.29 : 112,912.26 = 56,378.75 : x - Step 2: Convert to fraction form
81,864.29/112,912.26 = 56,378.75/x - Step 3: Cross multiply
81,864.29x = 112,912.26 × 56,378.75 - Step 4: Simplify right side
81,864.29x = 6,365,851,513.91 - Step 5: Solve for x
x = 6,365,851,513.91/81,864.29 - Step 6: Final answer
x = 77,761.03
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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.