Finding the Fourth Proportional to 139,988.13, 193,186.67 and 76,326.18
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Solution
The fourth proportional to 139,988.13, 193,186.67 and 76,326.18 is: 105,331.79
Step by Step Solution
- Step 1: Write the proportion equation
139,988.13 : 193,186.67 = 76,326.18 : x - Step 2: Convert to fraction form
139,988.13/193,186.67 = 76,326.18/x - Step 3: Cross multiply
139,988.13x = 193,186.67 × 76,326.18 - Step 4: Simplify right side
139,988.13x = 14,745,200,548.02 - Step 5: Solve for x
x = 14,745,200,548.02/139,988.13 - Step 6: Final answer
x = 105,331.79
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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.