Finding the Fourth Proportional to 100,684.99, 138,948.33 and 55,360.63
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Solution
The fourth proportional to 100,684.99, 138,948.33 and 55,360.63 is: 76,399.34
Step by Step Solution
- Step 1: Write the proportion equation
100,684.99 : 138,948.33 = 55,360.63 : x - Step 2: Convert to fraction form
100,684.99/138,948.33 = 55,360.63/x - Step 3: Cross multiply
100,684.99x = 138,948.33 × 55,360.63 - Step 4: Simplify right side
100,684.99x = 7,692,267,086.25 - Step 5: Solve for x
x = 7,692,267,086.25/100,684.99 - Step 6: Final answer
x = 76,399.34
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.