Finding the Fourth Proportional to 117,009.21, 161,421.43 and 68,586.60
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Solution
The fourth proportional to 117,009.21, 161,421.43 and 68,586.60 is: 94,619.45
Step by Step Solution
- Step 1: Write the proportion equation
117,009.21 : 161,421.43 = 68,586.60 : x - Step 2: Convert to fraction form
117,009.21/161,421.43 = 68,586.60/x - Step 3: Cross multiply
117,009.21x = 161,421.43 × 68,586.60 - Step 4: Simplify right side
117,009.21x = 11,071,346,898.21 - Step 5: Solve for x
x = 11,071,346,898.21/117,009.21 - Step 6: Final answer
x = 94,619.45
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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.