Finding the Fourth Proportional to 139,689.28, 192,775.44 and 76,031.68
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Solution
The fourth proportional to 139,689.28, 192,775.44 and 76,031.68 is: 104,926.02
Step by Step Solution
- Step 1: Write the proportion equation
139,689.28 : 192,775.44 = 76,031.68 : x - Step 2: Convert to fraction form
139,689.28/192,775.44 = 76,031.68/x - Step 3: Cross multiply
139,689.28x = 192,775.44 × 76,031.68 - Step 4: Simplify right side
139,689.28x = 14,657,040,565.94 - Step 5: Solve for x
x = 14,657,040,565.94/139,689.28 - Step 6: Final answer
x = 104,926.02
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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.