Finding the Fourth Proportional to 117,342.84, 161,890.68 and 77,078.40
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Solution
The fourth proportional to 117,342.84, 161,890.68 and 77,078.40 is: 106,340.32
Step by Step Solution
- Step 1: Write the proportion equation
117,342.84 : 161,890.68 = 77,078.40 : x - Step 2: Convert to fraction form
117,342.84/161,890.68 = 77,078.40/x - Step 3: Cross multiply
117,342.84x = 161,890.68 × 77,078.40 - Step 4: Simplify right side
117,342.84x = 12,478,274,589.31 - Step 5: Solve for x
x = 12,478,274,589.31/117,342.84 - Step 6: Final answer
x = 106,340.32
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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.