Finding the Fourth Proportional to 138,457.19, 191,070.92 and 74,794.99
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Solution
The fourth proportional to 138,457.19, 191,070.92 and 74,794.99 is: 103,217.09
Step by Step Solution
- Step 1: Write the proportion equation
138,457.19 : 191,070.92 = 74,794.99 : x - Step 2: Convert to fraction form
138,457.19/191,070.92 = 74,794.99/x - Step 3: Cross multiply
138,457.19x = 191,070.92 × 74,794.99 - Step 4: Simplify right side
138,457.19x = 14,291,147,550.69 - Step 5: Solve for x
x = 14,291,147,550.69/138,457.19 - Step 6: Final answer
x = 103,217.09
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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.