Finding the Fourth Proportional to 121,203.80, 181,805.70 and 68,715.80
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Solution
The fourth proportional to 121,203.80, 181,805.70 and 68,715.80 is: 103,073.70
Step by Step Solution
- Step 1: Write the proportion equation
121,203.80 : 181,805.70 = 68,715.80 : x - Step 2: Convert to fraction form
121,203.80/181,805.70 = 68,715.80/x - Step 3: Cross multiply
121,203.80x = 181,805.70 × 68,715.80 - Step 4: Simplify right side
121,203.80x = 12,492,924,120.06 - Step 5: Solve for x
x = 12,492,924,120.06/121,203.80 - Step 6: Final answer
x = 103,073.70
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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.