Finding the Fourth Proportional to 218,973.70, 328,217.55 and 85,809.70
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Solution
The fourth proportional to 218,973.70, 328,217.55 and 85,809.70 is: 128,619.33
Step by Step Solution
- Step 1: Write the proportion equation
218,973.70 : 328,217.55 = 85,809.70 : x - Step 2: Convert to fraction form
218,973.70/328,217.55 = 85,809.70/x - Step 3: Cross multiply
218,973.70x = 328,217.55 × 85,809.70 - Step 4: Simplify right side
218,973.70x = 28,164,249,500.24 - Step 5: Solve for x
x = 28,164,249,500.24/218,973.70 - Step 6: Final answer
x = 128,619.33
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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.