Finding the Fourth Proportional to 128,577.60, 192,717.36 and 76,031.28
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Solution
The fourth proportional to 128,577.60, 192,717.36 and 76,031.28 is: 113,958.79
Step by Step Solution
- Step 1: Write the proportion equation
128,577.60 : 192,717.36 = 76,031.28 : x - Step 2: Convert to fraction form
128,577.60/192,717.36 = 76,031.28/x - Step 3: Cross multiply
128,577.60x = 192,717.36 × 76,031.28 - Step 4: Simplify right side
128,577.60x = 14,652,547,559.02 - Step 5: Solve for x
x = 14,652,547,559.02/128,577.60 - Step 6: Final answer
x = 113,958.79
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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.