Finding the Fourth Proportional to 86,542.20, 129,813.30 and 36,605.70
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Solution
The fourth proportional to 86,542.20, 129,813.30 and 36,605.70 is: 54,908.55
Step by Step Solution
- Step 1: Write the proportion equation
86,542.20 : 129,813.30 = 36,605.70 : x - Step 2: Convert to fraction form
86,542.20/129,813.30 = 36,605.70/x - Step 3: Cross multiply
86,542.20x = 129,813.30 × 36,605.70 - Step 4: Simplify right side
86,542.20x = 4,751,906,715.81 - Step 5: Solve for x
x = 4,751,906,715.81/86,542.20 - Step 6: Final answer
x = 54,908.55
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1.5x scale
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.