Finding the Fourth Proportional to 87,545.75, 121,301.06 and 85,653.99
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Solution
The fourth proportional to 87,545.75, 121,301.06 and 85,653.99 is: 118,679.89
Step by Step Solution
- Step 1: Write the proportion equation
87,545.75 : 121,301.06 = 85,653.99 : x - Step 2: Convert to fraction form
87,545.75/121,301.06 = 85,653.99/x - Step 3: Cross multiply
87,545.75x = 121,301.06 × 85,653.99 - Step 4: Simplify right side
87,545.75x = 10,389,919,351.96 - Step 5: Solve for x
x = 10,389,919,351.96/87,545.75 - Step 6: Final answer
x = 118,679.89
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.