Finding the Fourth Proportional to 138,478.19, 191,099.99 and 74,815.97
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Solution
The fourth proportional to 138,478.19, 191,099.99 and 74,815.97 is: 103,246.08
Step by Step Solution
- Step 1: Write the proportion equation
138,478.19 : 191,099.99 = 74,815.97 : x - Step 2: Convert to fraction form
138,478.19/191,099.99 = 74,815.97/x - Step 3: Cross multiply
138,478.19x = 191,099.99 × 74,815.97 - Step 4: Simplify right side
138,478.19x = 14,297,330,350.38 - Step 5: Solve for x
x = 14,297,330,350.38/138,478.19 - Step 6: Final answer
x = 103,246.08
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.