Finding the Fourth Proportional to 212,719.70, 319,079.55 and 133,987.70
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Solution
The fourth proportional to 212,719.70, 319,079.55 and 133,987.70 is: 200,981.55
Step by Step Solution
- Step 1: Write the proportion equation
212,719.70 : 319,079.55 = 133,987.70 : x - Step 2: Convert to fraction form
212,719.70/319,079.55 = 133,987.70/x - Step 3: Cross multiply
212,719.70x = 319,079.55 × 133,987.70 - Step 4: Simplify right side
212,719.70x = 42,752,735,021.54 - Step 5: Solve for x
x = 42,752,735,021.54/212,719.70 - Step 6: Final answer
x = 200,981.55
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1.5x scale
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.