Finding the Fourth Proportional to 81,010.20, 121,515.30 and 66,235.80
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Solution
The fourth proportional to 81,010.20, 121,515.30 and 66,235.80 is: 99,353.70
Step by Step Solution
- Step 1: Write the proportion equation
81,010.20 : 121,515.30 = 66,235.80 : x - Step 2: Convert to fraction form
81,010.20/121,515.30 = 66,235.80/x - Step 3: Cross multiply
81,010.20x = 121,515.30 × 66,235.80 - Step 4: Simplify right side
81,010.20x = 8,048,663,107.74 - Step 5: Solve for x
x = 8,048,663,107.74/81,010.20 - Step 6: Final answer
x = 99,353.70
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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.