Finding the Fourth Proportional to 107,688.40, 161,705.40 and 72,782.80
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Solution
The fourth proportional to 107,688.40, 161,705.40 and 72,782.80 is: 109,290.99
Step by Step Solution
- Step 1: Write the proportion equation
107,688.40 : 161,705.40 = 72,782.80 : x - Step 2: Convert to fraction form
107,688.40/161,705.40 = 72,782.80/x - Step 3: Cross multiply
107,688.40x = 161,705.40 × 72,782.80 - Step 4: Simplify right side
107,688.40x = 11,769,371,787.12 - Step 5: Solve for x
x = 11,769,371,787.12/107,688.40 - Step 6: Final answer
x = 109,290.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.