Finding the Fourth Proportional to 77,811.44, 107,813.43 and 76,129.88
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Solution
The fourth proportional to 77,811.44, 107,813.43 and 76,129.88 is: 105,483.51
Step by Step Solution
- Step 1: Write the proportion equation
77,811.44 : 107,813.43 = 76,129.88 : x - Step 2: Convert to fraction form
77,811.44/107,813.43 = 76,129.88/x - Step 3: Cross multiply
77,811.44x = 107,813.43 × 76,129.88 - Step 4: Simplify right side
77,811.44x = 8,207,822,949.22 - Step 5: Solve for x
x = 8,207,822,949.22/77,811.44 - Step 6: Final answer
x = 105,483.51
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.