Finding the Fourth Proportional to 100,753.74, 139,040.15 and 55,430.75
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Solution
The fourth proportional to 100,753.74, 139,040.15 and 55,430.75 is: 76,494.43
Step by Step Solution
- Step 1: Write the proportion equation
100,753.74 : 139,040.15 = 55,430.75 : x - Step 2: Convert to fraction form
100,753.74/139,040.15 = 55,430.75/x - Step 3: Cross multiply
100,753.74x = 139,040.15 × 55,430.75 - Step 4: Simplify right side
100,753.74x = 7,707,099,865.06 - Step 5: Solve for x
x = 7,707,099,865.06/100,753.74 - Step 6: Final answer
x = 76,494.43
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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.