Finding the Fourth Proportional to 86,726.48, 129,988.36 and 36,789.68
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Solution
The fourth proportional to 86,726.48, 129,988.36 and 36,789.68 is: 55,141.52
Step by Step Solution
- Step 1: Write the proportion equation
86,726.48 : 129,988.36 = 36,789.68 : x - Step 2: Convert to fraction form
86,726.48/129,988.36 = 36,789.68/x - Step 3: Cross multiply
86,726.48x = 129,988.36 × 36,789.68 - Step 4: Simplify right side
86,726.48x = 4,782,230,168.12 - Step 5: Solve for x
x = 4,782,230,168.12/86,726.48 - Step 6: Final answer
x = 55,141.52
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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.