Finding the Fourth Proportional to 86,564.24, 129,846.36 and 78,891.92
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Solution
The fourth proportional to 86,564.24, 129,846.36 and 78,891.92 is: 118,337.88
Step by Step Solution
- Step 1: Write the proportion equation
86,564.24 : 129,846.36 = 78,891.92 : x - Step 2: Convert to fraction form
86,564.24/129,846.36 = 78,891.92/x - Step 3: Cross multiply
86,564.24x = 129,846.36 × 78,891.92 - Step 4: Simplify right side
86,564.24x = 10,243,828,645.41 - Step 5: Solve for x
x = 10,243,828,645.41/86,564.24 - Step 6: Final answer
x = 118,337.88
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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.