Finding the Fourth Proportional to 218,731.32, 328,086.05 and 85,635.99
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Solution
The fourth proportional to 218,731.32, 328,086.05 and 85,635.99 is: 128,449.70
Step by Step Solution
- Step 1: Write the proportion equation
218,731.32 : 328,086.05 = 85,635.99 : x - Step 2: Convert to fraction form
218,731.32/328,086.05 = 85,635.99/x - Step 3: Cross multiply
218,731.32x = 328,086.05 × 85,635.99 - Step 4: Simplify right side
218,731.32x = 28,095,973,268.76 - Step 5: Solve for x
x = 28,095,973,268.76/218,731.32 - Step 6: Final answer
x = 128,449.70
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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.