Finding the Fourth Proportional to 74,212.36, 102,412.80 and 40,221.68
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Solution
The fourth proportional to 74,212.36, 102,412.80 and 40,221.68 is: 55,505.77
Step by Step Solution
- Step 1: Write the proportion equation
74,212.36 : 102,412.80 = 40,221.68 : x - Step 2: Convert to fraction form
74,212.36/102,412.80 = 40,221.68/x - Step 3: Cross multiply
74,212.36x = 102,412.80 × 40,221.68 - Step 4: Simplify right side
74,212.36x = 4,119,214,357.44 - Step 5: Solve for x
x = 4,119,214,357.44/74,212.36 - Step 6: Final answer
x = 55,505.77
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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.