Finding the Fourth Proportional to 138,876.24, 207,904.76 and 86,115.92
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Solution
The fourth proportional to 138,876.24, 207,904.76 and 86,115.92 is: 128,919.89
Step by Step Solution
- Step 1: Write the proportion equation
138,876.24 : 207,904.76 = 86,115.92 : x - Step 2: Convert to fraction form
138,876.24/207,904.76 = 86,115.92/x - Step 3: Cross multiply
138,876.24x = 207,904.76 × 86,115.92 - Step 4: Simplify right side
138,876.24x = 17,903,909,679.78 - Step 5: Solve for x
x = 17,903,909,679.78/138,876.24 - Step 6: Final answer
x = 128,919.89
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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.