Finding the Fourth Proportional to 135,421.28, 186,880.32 and 74,991.68
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Solution
The fourth proportional to 135,421.28, 186,880.32 and 74,991.68 is: 103,487.94
Step by Step Solution
- Step 1: Write the proportion equation
135,421.28 : 186,880.32 = 74,991.68 : x - Step 2: Convert to fraction form
135,421.28/186,880.32 = 74,991.68/x - Step 3: Cross multiply
135,421.28x = 186,880.32 × 74,991.68 - Step 4: Simplify right side
135,421.28x = 14,014,469,155.74 - Step 5: Solve for x
x = 14,014,469,155.74/135,421.28 - Step 6: Final answer
x = 103,487.94
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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.