Finding the Fourth Proportional to 81,781.19, 122,688.27 and 29,189.31
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Solution
The fourth proportional to 81,781.19, 122,688.27 and 29,189.31 is: 43,789.85
Step by Step Solution
- Step 1: Write the proportion equation
81,781.19 : 122,688.27 = 29,189.31 : x - Step 2: Convert to fraction form
81,781.19/122,688.27 = 29,189.31/x - Step 3: Cross multiply
81,781.19x = 122,688.27 × 29,189.31 - Step 4: Simplify right side
81,781.19x = 3,581,186,176.43 - Step 5: Solve for x
x = 3,581,186,176.43/81,781.19 - Step 6: Final answer
x = 43,789.85
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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.