Finding the Fourth Proportional to 212,612.47, 318,930.35 and 86,233.95
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Solution
The fourth proportional to 212,612.47, 318,930.35 and 86,233.95 is: 129,355.65
Step by Step Solution
- Step 1: Write the proportion equation
212,612.47 : 318,930.35 = 86,233.95 : x - Step 2: Convert to fraction form
212,612.47/318,930.35 = 86,233.95/x - Step 3: Cross multiply
212,612.47x = 318,930.35 × 86,233.95 - Step 4: Simplify right side
212,612.47x = 27,502,623,424.21 - Step 5: Solve for x
x = 27,502,623,424.21/212,612.47 - Step 6: Final answer
x = 129,355.65
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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.