Finding the Fourth Proportional to 86,980.32, 119,765.93 and 76,163.31
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Solution
The fourth proportional to 86,980.32, 119,765.93 and 76,163.31 is: 104,871.65
Step by Step Solution
- Step 1: Write the proportion equation
86,980.32 : 119,765.93 = 76,163.31 : x - Step 2: Convert to fraction form
86,980.32/119,765.93 = 76,163.31/x - Step 3: Cross multiply
86,980.32x = 119,765.93 × 76,163.31 - Step 4: Simplify right side
86,980.32x = 9,121,769,273.21 - Step 5: Solve for x
x = 9,121,769,273.21/86,980.32 - Step 6: Final answer
x = 104,871.65
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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.