Finding the Fourth Proportional to 81,688.05, 122,556.69 and 29,090.70
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Solution
The fourth proportional to 81,688.05, 122,556.69 and 29,090.70 is: 43,644.82
Step by Step Solution
- Step 1: Write the proportion equation
81,688.05 : 122,556.69 = 29,090.70 : x - Step 2: Convert to fraction form
81,688.05/122,556.69 = 29,090.70/x - Step 3: Cross multiply
81,688.05x = 122,556.69 × 29,090.70 - Step 4: Simplify right side
81,688.05x = 3,565,259,901.78 - Step 5: Solve for x
x = 3,565,259,901.78/81,688.05 - Step 6: Final answer
x = 43,644.82
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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.