Finding the Fourth Proportional to 218,975.70, 328,220.55 and 85,811.70
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Solution
The fourth proportional to 218,975.70, 328,220.55 and 85,811.70 is: 128,622.32
Step by Step Solution
- Step 1: Write the proportion equation
218,975.70 : 328,220.55 = 85,811.70 : x - Step 2: Convert to fraction form
218,975.70/328,220.55 = 85,811.70/x - Step 3: Cross multiply
218,975.70x = 328,220.55 × 85,811.70 - Step 4: Simplify right side
218,975.70x = 28,165,163,370.44 - Step 5: Solve for x
x = 28,165,163,370.44/218,975.70 - Step 6: Final answer
x = 128,622.32
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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.