Finding the Fourth Proportional to 138,825.10, 207,946.05 and 76,422.70
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Solution
The fourth proportional to 138,825.10, 207,946.05 and 76,422.70 is: 114,473.53
Step by Step Solution
- Step 1: Write the proportion equation
138,825.10 : 207,946.05 = 76,422.70 : x - Step 2: Convert to fraction form
138,825.10/207,946.05 = 76,422.70/x - Step 3: Cross multiply
138,825.10x = 207,946.05 × 76,422.70 - Step 4: Simplify right side
138,825.10x = 15,891,798,595.34 - Step 5: Solve for x
x = 15,891,798,595.34/138,825.10 - Step 6: Final answer
x = 114,473.53
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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.