Finding the Fourth Proportional to 81,289.89, 112,217.69 and 47,285.99
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Solution
The fourth proportional to 81,289.89, 112,217.69 and 47,285.99 is: 65,276.56
Step by Step Solution
- Step 1: Write the proportion equation
81,289.89 : 112,217.69 = 47,285.99 : x - Step 2: Convert to fraction form
81,289.89/112,217.69 = 47,285.99/x - Step 3: Cross multiply
81,289.89x = 112,217.69 × 47,285.99 - Step 4: Simplify right side
81,289.89x = 5,306,324,124.29 - Step 5: Solve for x
x = 5,306,324,124.29/81,289.89 - Step 6: Final answer
x = 65,276.56
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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.