Finding the Fourth Proportional to 139,841.31, 192,980.01 and 76,179.09
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Solution
The fourth proportional to 139,841.31, 192,980.01 and 76,179.09 is: 105,126.60
Step by Step Solution
- Step 1: Write the proportion equation
139,841.31 : 192,980.01 = 76,179.09 : x - Step 2: Convert to fraction form
139,841.31/192,980.01 = 76,179.09/x - Step 3: Cross multiply
139,841.31x = 192,980.01 × 76,179.09 - Step 4: Simplify right side
139,841.31x = 14,701,041,549.99 - Step 5: Solve for x
x = 14,701,041,549.99/139,841.31 - Step 6: Final answer
x = 105,126.60
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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.