Finding the Fourth Proportional to 81,281.51, 121,909.94 and 22,121.79
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Solution
The fourth proportional to 81,281.51, 121,909.94 and 22,121.79 is: 33,179.33
Step by Step Solution
- Step 1: Write the proportion equation
81,281.51 : 121,909.94 = 22,121.79 : x - Step 2: Convert to fraction form
81,281.51/121,909.94 = 22,121.79/x - Step 3: Cross multiply
81,281.51x = 121,909.94 × 22,121.79 - Step 4: Simplify right side
81,281.51x = 2,696,866,091.59 - Step 5: Solve for x
x = 2,696,866,091.59/81,281.51 - Step 6: Final answer
x = 33,179.33
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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.