Finding the Fourth Proportional to 79,970.99, 119,956.64 and 20,806.56
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Solution
The fourth proportional to 79,970.99, 119,956.64 and 20,806.56 is: 31,209.88
Step by Step Solution
- Step 1: Write the proportion equation
79,970.99 : 119,956.64 = 20,806.56 : x - Step 2: Convert to fraction form
79,970.99/119,956.64 = 20,806.56/x - Step 3: Cross multiply
79,970.99x = 119,956.64 × 20,806.56 - Step 4: Simplify right side
79,970.99x = 2,495,884,923.53 - Step 5: Solve for x
x = 2,495,884,923.53/79,970.99 - Step 6: Final answer
x = 31,209.88
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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.