Finding the Fourth Proportional to 72,722.19, 109,071.14 and 20,136.99
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Solution
The fourth proportional to 72,722.19, 109,071.14 and 20,136.99 is: 30,202.12
Step by Step Solution
- Step 1: Write the proportion equation
72,722.19 : 109,071.14 = 20,136.99 : x - Step 2: Convert to fraction form
72,722.19/109,071.14 = 20,136.99/x - Step 3: Cross multiply
72,722.19x = 109,071.14 × 20,136.99 - Step 4: Simplify right side
72,722.19x = 2,196,364,354.78 - Step 5: Solve for x
x = 2,196,364,354.78/72,722.19 - Step 6: Final answer
x = 30,202.12
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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.