Finding the Fourth Proportional to 112,428.28, 155,149.12 and 61,439.88
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Solution
The fourth proportional to 112,428.28, 155,149.12 and 61,439.88 is: 84,785.99
Step by Step Solution
- Step 1: Write the proportion equation
112,428.28 : 155,149.12 = 61,439.88 : x - Step 2: Convert to fraction form
112,428.28/155,149.12 = 61,439.88/x - Step 3: Cross multiply
112,428.28x = 155,149.12 × 61,439.88 - Step 4: Simplify right side
112,428.28x = 9,532,343,314.91 - Step 5: Solve for x
x = 9,532,343,314.91/112,428.28 - Step 6: Final answer
x = 84,785.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.