Finding the Fourth Proportional to 121,379.20, 182,068.80 and 77,201.80
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Solution
The fourth proportional to 121,379.20, 182,068.80 and 77,201.80 is: 115,802.70
Step by Step Solution
- Step 1: Write the proportion equation
121,379.20 : 182,068.80 = 77,201.80 : x - Step 2: Convert to fraction form
121,379.20/182,068.80 = 77,201.80/x - Step 3: Cross multiply
121,379.20x = 182,068.80 × 77,201.80 - Step 4: Simplify right side
121,379.20x = 14,056,039,083.84 - Step 5: Solve for x
x = 14,056,039,083.84/121,379.20 - Step 6: Final answer
x = 115,802.70
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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.