Finding the Fourth Proportional to 129,310.24, 178,451.68 and 78,312.20
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Solution
The fourth proportional to 129,310.24, 178,451.68 and 78,312.20 is: 108,072.99
Step by Step Solution
- Step 1: Write the proportion equation
129,310.24 : 178,451.68 = 78,312.20 : x - Step 2: Convert to fraction form
129,310.24/178,451.68 = 78,312.20/x - Step 3: Cross multiply
129,310.24x = 178,451.68 × 78,312.20 - Step 4: Simplify right side
129,310.24x = 13,974,943,654.50 - Step 5: Solve for x
x = 13,974,943,654.50/129,310.24 - Step 6: Final answer
x = 108,072.99
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1.5x scale
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.