Finding the Fourth Proportional to 212,903.10, 319,354.69 and 86,612.05
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Solution
The fourth proportional to 212,903.10, 319,354.69 and 86,612.05 is: 129,918.09
Step by Step Solution
- Step 1: Write the proportion equation
212,903.10 : 319,354.69 = 86,612.05 : x - Step 2: Convert to fraction form
212,903.10/319,354.69 = 86,612.05/x - Step 3: Cross multiply
212,903.10x = 319,354.69 × 86,612.05 - Step 4: Simplify right side
212,903.10x = 27,659,962,781.24 - Step 5: Solve for x
x = 27,659,962,781.24/212,903.10 - Step 6: Final answer
x = 129,918.09
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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.