Finding the Fourth Proportional to 139,344.17, 192,262.01 and 81,985.99
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Solution
The fourth proportional to 139,344.17, 192,262.01 and 81,985.99 is: 113,121.28
Step by Step Solution
- Step 1: Write the proportion equation
139,344.17 : 192,262.01 = 81,985.99 : x - Step 2: Convert to fraction form
139,344.17/192,262.01 = 81,985.99/x - Step 3: Cross multiply
139,344.17x = 192,262.01 × 81,985.99 - Step 4: Simplify right side
139,344.17x = 15,762,790,699.15 - Step 5: Solve for x
x = 15,762,790,699.15/139,344.17 - Step 6: Final answer
x = 113,121.28
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1.5x scale
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.