Finding the Fourth Proportional to 77,620.86, 115,751.94 and 76,911.42
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Solution
The fourth proportional to 77,620.86, 115,751.94 and 76,911.42 is: 114,693.99
Step by Step Solution
- Step 1: Write the proportion equation
77,620.86 : 115,751.94 = 76,911.42 : x - Step 2: Convert to fraction form
77,620.86/115,751.94 = 76,911.42/x - Step 3: Cross multiply
77,620.86x = 115,751.94 × 76,911.42 - Step 4: Simplify right side
77,620.86x = 8,902,646,073.15 - Step 5: Solve for x
x = 8,902,646,073.15/77,620.86 - Step 6: Final answer
x = 114,693.99
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.