Finding the Fourth Proportional to 138,623.58, 207,913.68 and 45,128.70
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Solution
The fourth proportional to 138,623.58, 207,913.68 and 45,128.70 is: 67,685.99
Step by Step Solution
- Step 1: Write the proportion equation
138,623.58 : 207,913.68 = 45,128.70 : x - Step 2: Convert to fraction form
138,623.58/207,913.68 = 45,128.70/x - Step 3: Cross multiply
138,623.58x = 207,913.68 × 45,128.70 - Step 4: Simplify right side
138,623.58x = 9,382,874,090.62 - Step 5: Solve for x
x = 9,382,874,090.62/138,623.58 - Step 6: Final answer
x = 67,685.99
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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.