Finding the Fourth Proportional to 138,290.62, 190,844.90 and 84,574.66
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Solution
The fourth proportional to 138,290.62, 190,844.90 and 84,574.66 is: 116,715.38
Step by Step Solution
- Step 1: Write the proportion equation
138,290.62 : 190,844.90 = 84,574.66 : x - Step 2: Convert to fraction form
138,290.62/190,844.90 = 84,574.66/x - Step 3: Cross multiply
138,290.62x = 190,844.90 × 84,574.66 - Step 4: Simplify right side
138,290.62x = 16,140,642,530.23 - Step 5: Solve for x
x = 16,140,642,530.23/138,290.62 - Step 6: Final answer
x = 116,715.38
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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.