Finding the Fourth Proportional to 129,256.86, 178,371.30 and 71,895.99
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Solution
The fourth proportional to 129,256.86, 178,371.30 and 71,895.99 is: 99,214.70
Step by Step Solution
- Step 1: Write the proportion equation
129,256.86 : 178,371.30 = 71,895.99 : x - Step 2: Convert to fraction form
129,256.86/178,371.30 = 71,895.99/x - Step 3: Cross multiply
129,256.86x = 178,371.30 × 71,895.99 - Step 4: Simplify right side
129,256.86x = 12,824,181,201.09 - Step 5: Solve for x
x = 12,824,181,201.09/129,256.86 - Step 6: Final answer
x = 99,214.70
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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.