Finding the Fourth Proportional to 109,785.92, 151,448.80 and 69,431.68
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Solution
The fourth proportional to 109,785.92, 151,448.80 and 69,431.68 is: 95,780.45
Step by Step Solution
- Step 1: Write the proportion equation
109,785.92 : 151,448.80 = 69,431.68 : x - Step 2: Convert to fraction form
109,785.92/151,448.80 = 69,431.68/x - Step 3: Cross multiply
109,785.92x = 151,448.80 × 69,431.68 - Step 4: Simplify right side
109,785.92x = 10,515,344,617.98 - Step 5: Solve for x
x = 10,515,344,617.98/109,785.92 - Step 6: Final answer
x = 95,780.45
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1.5x scale
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.