Finding the Fourth Proportional to 76,953.20, 115,429.80 and 68,658.80
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Solution
The fourth proportional to 76,953.20, 115,429.80 and 68,658.80 is: 102,988.20
Step by Step Solution
- Step 1: Write the proportion equation
76,953.20 : 115,429.80 = 68,658.80 : x - Step 2: Convert to fraction form
76,953.20/115,429.80 = 68,658.80/x - Step 3: Cross multiply
76,953.20x = 115,429.80 × 68,658.80 - Step 4: Simplify right side
76,953.20x = 7,925,271,552.24 - Step 5: Solve for x
x = 7,925,271,552.24/76,953.20 - Step 6: Final answer
x = 102,988.20
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1.5x scale
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.