Finding the Fourth Proportional to 75,028.91, 103,491.09 and 48,128.81
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Solution
The fourth proportional to 75,028.91, 103,491.09 and 48,128.81 is: 66,386.45
Step by Step Solution
- Step 1: Write the proportion equation
75,028.91 : 103,491.09 = 48,128.81 : x - Step 2: Convert to fraction form
75,028.91/103,491.09 = 48,128.81/x - Step 3: Cross multiply
75,028.91x = 103,491.09 × 48,128.81 - Step 4: Simplify right side
75,028.91x = 4,980,903,007.30 - Step 5: Solve for x
x = 4,980,903,007.30/75,028.91 - Step 6: Final answer
x = 66,386.45
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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.