Finding the Fourth Proportional to 103,979.44, 143,322.36 and 81,278.36
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Solution
The fourth proportional to 103,979.44, 143,322.36 and 81,278.36 is: 112,031.82
Step by Step Solution
- Step 1: Write the proportion equation
103,979.44 : 143,322.36 = 81,278.36 : x - Step 2: Convert to fraction form
103,979.44/143,322.36 = 81,278.36/x - Step 3: Cross multiply
103,979.44x = 143,322.36 × 81,278.36 - Step 4: Simplify right side
103,979.44x = 11,649,006,372.13 - Step 5: Solve for x
x = 11,649,006,372.13/103,979.44 - Step 6: Final answer
x = 112,031.82
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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.