Finding the Fourth Proportional to 139,649.24, 192,720.80 and 75,989.48
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Solution
The fourth proportional to 139,649.24, 192,720.80 and 75,989.48 is: 104,868.12
Step by Step Solution
- Step 1: Write the proportion equation
139,649.24 : 192,720.80 = 75,989.48 : x - Step 2: Convert to fraction form
139,649.24/192,720.80 = 75,989.48/x - Step 3: Cross multiply
139,649.24x = 192,720.80 × 75,989.48 - Step 4: Simplify right side
139,649.24x = 14,644,753,377.18 - Step 5: Solve for x
x = 14,644,753,377.18/139,649.24 - Step 6: Final answer
x = 104,868.12
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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.