Finding the Fourth Proportional to 81,028.23, 121,542.35 and 21,863.90
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Solution
The fourth proportional to 81,028.23, 121,542.35 and 21,863.90 is: 32,795.84
Step by Step Solution
- Step 1: Write the proportion equation
81,028.23 : 121,542.35 = 21,863.90 : x - Step 2: Convert to fraction form
81,028.23/121,542.35 = 21,863.90/x - Step 3: Cross multiply
81,028.23x = 121,542.35 × 21,863.90 - Step 4: Simplify right side
81,028.23x = 2,657,389,069.13 - Step 5: Solve for x
x = 2,657,389,069.13/81,028.23 - Step 6: Final answer
x = 32,795.84
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1.5x scale
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.