Finding the Fourth Proportional to 133,358.40, 199,687.68 and 86,469.12
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Solution
The fourth proportional to 133,358.40, 199,687.68 and 86,469.12 is: 129,476.79
Step by Step Solution
- Step 1: Write the proportion equation
133,358.40 : 199,687.68 = 86,469.12 : x - Step 2: Convert to fraction form
133,358.40/199,687.68 = 86,469.12/x - Step 3: Cross multiply
133,358.40x = 199,687.68 × 86,469.12 - Step 4: Simplify right side
133,358.40x = 17,266,817,964.44 - Step 5: Solve for x
x = 17,266,817,964.44/133,358.40 - Step 6: Final answer
x = 129,476.79
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.