Finding the Fourth Proportional to 212,420.68, 318,631.03 and 79,311.32
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Solution
The fourth proportional to 212,420.68, 318,631.03 and 79,311.32 is: 118,966.99
Step by Step Solution
- Step 1: Write the proportion equation
212,420.68 : 318,631.03 = 79,311.32 : x - Step 2: Convert to fraction form
212,420.68/318,631.03 = 79,311.32/x - Step 3: Cross multiply
212,420.68x = 318,631.03 × 79,311.32 - Step 4: Simplify right side
212,420.68x = 25,271,048,477.98 - Step 5: Solve for x
x = 25,271,048,477.98/212,420.68 - Step 6: Final answer
x = 118,966.99
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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.