Finding the Fourth Proportional to 138,582.76, 191,243.64 and 74,920.56
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Solution
The fourth proportional to 138,582.76, 191,243.64 and 74,920.56 is: 103,390.07
Step by Step Solution
- Step 1: Write the proportion equation
138,582.76 : 191,243.64 = 74,920.56 : x - Step 2: Convert to fraction form
138,582.76/191,243.64 = 74,920.56/x - Step 3: Cross multiply
138,582.76x = 191,243.64 × 74,920.56 - Step 4: Simplify right side
138,582.76x = 14,328,080,605.24 - Step 5: Solve for x
x = 14,328,080,605.24/138,582.76 - Step 6: Final answer
x = 103,390.07
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1.5x scale
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.