Finding the Fourth Proportional to 76,578.21, 105,677.99 and 42,585.96
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Solution
The fourth proportional to 76,578.21, 105,677.99 and 42,585.96 is: 58,768.65
Step by Step Solution
- Step 1: Write the proportion equation
76,578.21 : 105,677.99 = 42,585.96 : x - Step 2: Convert to fraction form
76,578.21/105,677.99 = 42,585.96/x - Step 3: Cross multiply
76,578.21x = 105,677.99 × 42,585.96 - Step 4: Simplify right side
76,578.21x = 4,500,398,126.63 - Step 5: Solve for x
x = 4,500,398,126.63/76,578.21 - Step 6: Final answer
x = 58,768.65
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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.