Finding the Fourth Proportional to 86,064.76, 128,232.11 and 81,230.31
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Solution
The fourth proportional to 86,064.76, 128,232.11 and 81,230.31 is: 121,029.03
Step by Step Solution
- Step 1: Write the proportion equation
86,064.76 : 128,232.11 = 81,230.31 : x - Step 2: Convert to fraction form
86,064.76/128,232.11 = 81,230.31/x - Step 3: Cross multiply
86,064.76x = 128,232.11 × 81,230.31 - Step 4: Simplify right side
86,064.76x = 10,416,334,047.25 - Step 5: Solve for x
x = 10,416,334,047.25/86,064.76 - Step 6: Final answer
x = 121,029.03
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.