Finding the Fourth Proportional to 81,145.84, 121,725.18 and 28,567.12
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Solution
The fourth proportional to 81,145.84, 121,725.18 and 28,567.12 is: 42,852.94
Step by Step Solution
- Step 1: Write the proportion equation
81,145.84 : 121,725.18 = 28,567.12 : x - Step 2: Convert to fraction form
81,145.84/121,725.18 = 28,567.12/x - Step 3: Cross multiply
81,145.84x = 121,725.18 × 28,567.12 - Step 4: Simplify right side
81,145.84x = 3,477,337,824.08 - Step 5: Solve for x
x = 3,477,337,824.08/81,145.84 - Step 6: Final answer
x = 42,852.94
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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.