Finding the Fourth Proportional to 76,431.84, 114,644.64 and 38,991.09
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Solution
The fourth proportional to 76,431.84, 114,644.64 and 38,991.09 is: 58,485.04
Step by Step Solution
- Step 1: Write the proportion equation
76,431.84 : 114,644.64 = 38,991.09 : x - Step 2: Convert to fraction form
76,431.84/114,644.64 = 38,991.09/x - Step 3: Cross multiply
76,431.84x = 114,644.64 × 38,991.09 - Step 4: Simplify right side
76,431.84x = 4,470,119,476.26 - Step 5: Solve for x
x = 4,470,119,476.26/76,431.84 - Step 6: Final answer
x = 58,485.04
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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.