Finding the Fourth Proportional to 77,980.35, 116,949.78 and 21,816.99
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Solution
The fourth proportional to 77,980.35, 116,949.78 and 21,816.99 is: 32,719.68
Step by Step Solution
- Step 1: Write the proportion equation
77,980.35 : 116,949.78 = 21,816.99 : x - Step 2: Convert to fraction form
77,980.35/116,949.78 = 21,816.99/x - Step 3: Cross multiply
77,980.35x = 116,949.78 × 21,816.99 - Step 4: Simplify right side
77,980.35x = 2,551,492,180.76 - Step 5: Solve for x
x = 2,551,492,180.76/77,980.35 - Step 6: Final answer
x = 32,719.68
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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.