Finding the Fourth Proportional to 135,431.38, 201,717.14 and 128,318.77
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Solution
The fourth proportional to 135,431.38, 201,717.14 and 128,318.77 is: 191,123.32
Step by Step Solution
- Step 1: Write the proportion equation
135,431.38 : 201,717.14 = 128,318.77 : x - Step 2: Convert to fraction form
135,431.38/201,717.14 = 128,318.77/x - Step 3: Cross multiply
135,431.38x = 201,717.14 × 128,318.77 - Step 4: Simplify right side
135,431.38x = 25,884,095,292.72 - Step 5: Solve for x
x = 25,884,095,292.72/135,431.38 - Step 6: Final answer
x = 191,123.32
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.