Finding the Fourth Proportional to 100,809.36, 139,135.32 and 58,371.84
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Solution
The fourth proportional to 100,809.36, 139,135.32 and 58,371.84 is: 80,563.80
Step by Step Solution
- Step 1: Write the proportion equation
100,809.36 : 139,135.32 = 58,371.84 : x - Step 2: Convert to fraction form
100,809.36/139,135.32 = 58,371.84/x - Step 3: Cross multiply
100,809.36x = 139,135.32 × 58,371.84 - Step 4: Simplify right side
100,809.36x = 8,121,584,637.39 - Step 5: Solve for x
x = 8,121,584,637.39/100,809.36 - Step 6: Final answer
x = 80,563.80
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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.