Finding the Fourth Proportional to 138,715.24, 207,985.38 and 76,429.48
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Solution
The fourth proportional to 138,715.24, 207,985.38 and 76,429.48 is: 114,596.02
Step by Step Solution
- Step 1: Write the proportion equation
138,715.24 : 207,985.38 = 76,429.48 : x - Step 2: Convert to fraction form
138,715.24/207,985.38 = 76,429.48/x - Step 3: Cross multiply
138,715.24x = 207,985.38 × 76,429.48 - Step 4: Simplify right side
138,715.24x = 15,896,214,441.00 - Step 5: Solve for x
x = 15,896,214,441.00/138,715.24 - Step 6: Final answer
x = 114,596.02
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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.