Finding the Fourth Proportional to 138,478.05, 207,752.09 and 38,638.22
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Solution
The fourth proportional to 138,478.05, 207,752.09 and 38,638.22 is: 57,967.09
Step by Step Solution
- Step 1: Write the proportion equation
138,478.05 : 207,752.09 = 38,638.22 : x - Step 2: Convert to fraction form
138,478.05/207,752.09 = 38,638.22/x - Step 3: Cross multiply
138,478.05x = 207,752.09 × 38,638.22 - Step 4: Simplify right side
138,478.05x = 8,027,169,726.93 - Step 5: Solve for x
x = 8,027,169,726.93/138,478.05 - Step 6: Final answer
x = 57,967.09
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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.