Finding the Fourth Proportional to 68,473.20, 102,709.80 and 56,953.20
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Solution
The fourth proportional to 68,473.20, 102,709.80 and 56,953.20 is: 85,429.80
Step by Step Solution
- Step 1: Write the proportion equation
68,473.20 : 102,709.80 = 56,953.20 : x - Step 2: Convert to fraction form
68,473.20/102,709.80 = 56,953.20/x - Step 3: Cross multiply
68,473.20x = 102,709.80 × 56,953.20 - Step 4: Simplify right side
68,473.20x = 5,849,651,781.36 - Step 5: Solve for x
x = 5,849,651,781.36/68,473.20 - Step 6: Final answer
x = 85,429.80
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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.