Finding the Fourth Proportional to 135,666.64, 187,231.80 and 79,076.80
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Solution
The fourth proportional to 135,666.64, 187,231.80 and 79,076.80 is: 109,132.88
Step by Step Solution
- Step 1: Write the proportion equation
135,666.64 : 187,231.80 = 79,076.80 : x - Step 2: Convert to fraction form
135,666.64/187,231.80 = 79,076.80/x - Step 3: Cross multiply
135,666.64x = 187,231.80 × 79,076.80 - Step 4: Simplify right side
135,666.64x = 14,805,691,602.24 - Step 5: Solve for x
x = 14,805,691,602.24/135,666.64 - Step 6: Final answer
x = 109,132.88
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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.