Finding the Fourth Proportional to 129,655.29, 178,877.79 and 75,920.70
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Solution
The fourth proportional to 129,655.29, 178,877.79 and 75,920.70 is: 104,743.33
Step by Step Solution
- Step 1: Write the proportion equation
129,655.29 : 178,877.79 = 75,920.70 : x - Step 2: Convert to fraction form
129,655.29/178,877.79 = 75,920.70/x - Step 3: Cross multiply
129,655.29x = 178,877.79 × 75,920.70 - Step 4: Simplify right side
129,655.29x = 13,580,527,031.25 - Step 5: Solve for x
x = 13,580,527,031.25/129,655.29 - Step 6: Final answer
x = 104,743.33
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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.