Finding the Fourth Proportional to 212,907.15, 319,360.68 and 86,616.09
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Solution
The fourth proportional to 212,907.15, 319,360.68 and 86,616.09 is: 129,924.12
Step by Step Solution
- Step 1: Write the proportion equation
212,907.15 : 319,360.68 = 86,616.09 : x - Step 2: Convert to fraction form
212,907.15/319,360.68 = 86,616.09/x - Step 3: Cross multiply
212,907.15x = 319,360.68 × 86,616.09 - Step 4: Simplify right side
212,907.15x = 27,661,773,401.34 - Step 5: Solve for x
x = 27,661,773,401.34/212,907.15 - Step 6: Final answer
x = 129,924.12
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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.