Finding the Fourth Proportional to 121,211.80, 181,817.70 and 68,723.80
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Solution
The fourth proportional to 121,211.80, 181,817.70 and 68,723.80 is: 103,085.70
Step by Step Solution
- Step 1: Write the proportion equation
121,211.80 : 181,817.70 = 68,723.80 : x - Step 2: Convert to fraction form
121,211.80/181,817.70 = 68,723.80/x - Step 3: Cross multiply
121,211.80x = 181,817.70 × 68,723.80 - Step 4: Simplify right side
121,211.80x = 12,495,203,251.26 - Step 5: Solve for x
x = 12,495,203,251.26/121,211.80 - Step 6: Final answer
x = 103,085.70
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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.