Finding the Fourth Proportional to 81,728.19, 122,560.29 and 31,801.68
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Solution
The fourth proportional to 81,728.19, 122,560.29 and 31,801.68 is: 47,690.07
Step by Step Solution
- Step 1: Write the proportion equation
81,728.19 : 122,560.29 = 31,801.68 : x - Step 2: Convert to fraction form
81,728.19/122,560.29 = 31,801.68/x - Step 3: Cross multiply
81,728.19x = 122,560.29 × 31,801.68 - Step 4: Simplify right side
81,728.19x = 3,897,623,123.29 - Step 5: Solve for x
x = 3,897,623,123.29/81,728.19 - Step 6: Final answer
x = 47,690.07
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.