Finding the Fourth Proportional to 104,138.79, 143,711.32 and 56,391.99
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Solution
The fourth proportional to 104,138.79, 143,711.32 and 56,391.99 is: 77,820.83
Step by Step Solution
- Step 1: Write the proportion equation
104,138.79 : 143,711.32 = 56,391.99 : x - Step 2: Convert to fraction form
104,138.79/143,711.32 = 56,391.99/x - Step 3: Cross multiply
104,138.79x = 143,711.32 × 56,391.99 - Step 4: Simplify right side
104,138.79x = 8,104,167,320.33 - Step 5: Solve for x
x = 8,104,167,320.33/104,138.79 - Step 6: Final answer
x = 77,820.83
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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.