Finding the Fourth Proportional to 100,645.47, 138,903.84 and 64,939.35
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Solution
The fourth proportional to 100,645.47, 138,903.84 and 64,939.35 is: 89,624.75
Step by Step Solution
- Step 1: Write the proportion equation
100,645.47 : 138,903.84 = 64,939.35 : x - Step 2: Convert to fraction form
100,645.47/138,903.84 = 64,939.35/x - Step 3: Cross multiply
100,645.47x = 138,903.84 × 64,939.35 - Step 4: Simplify right side
100,645.47x = 9,020,325,082.10 - Step 5: Solve for x
x = 9,020,325,082.10/100,645.47 - Step 6: Final answer
x = 89,624.75
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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.