Finding the Fourth Proportional to 84,428.16, 126,558.72 and 39,976.80
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Solution
The fourth proportional to 84,428.16, 126,558.72 and 39,976.80 is: 59,925.65
Step by Step Solution
- Step 1: Write the proportion equation
84,428.16 : 126,558.72 = 39,976.80 : x - Step 2: Convert to fraction form
84,428.16/126,558.72 = 39,976.80/x - Step 3: Cross multiply
84,428.16x = 126,558.72 × 39,976.80 - Step 4: Simplify right side
84,428.16x = 5,059,412,637.70 - Step 5: Solve for x
x = 5,059,412,637.70/84,428.16 - Step 6: Final answer
x = 59,925.65
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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.