Finding the Fourth Proportional to 81,266.20, 121,899.30 and 68,435.80
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Solution
The fourth proportional to 81,266.20, 121,899.30 and 68,435.80 is: 102,653.70
Step by Step Solution
- Step 1: Write the proportion equation
81,266.20 : 121,899.30 = 68,435.80 : x - Step 2: Convert to fraction form
81,266.20/121,899.30 = 68,435.80/x - Step 3: Cross multiply
81,266.20x = 121,899.30 × 68,435.80 - Step 4: Simplify right side
81,266.20x = 8,342,276,114.94 - Step 5: Solve for x
x = 8,342,276,114.94/81,266.20 - Step 6: Final answer
x = 102,653.70
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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.