Finding the Fourth Proportional to 86,278.94, 129,358.36 and 38,221.44
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Solution
The fourth proportional to 86,278.94, 129,358.36 and 38,221.44 is: 57,305.56
Step by Step Solution
- Step 1: Write the proportion equation
86,278.94 : 129,358.36 = 38,221.44 : x - Step 2: Convert to fraction form
86,278.94/129,358.36 = 38,221.44/x - Step 3: Cross multiply
86,278.94x = 129,358.36 × 38,221.44 - Step 4: Simplify right side
86,278.94x = 4,944,262,699.68 - Step 5: Solve for x
x = 4,944,262,699.68/86,278.94 - Step 6: Final answer
x = 57,305.56
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.