Finding the Fourth Proportional to 76,139.84, 105,120.77 and 48,928.09
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Solution
The fourth proportional to 76,139.84, 105,120.77 and 48,928.09 is: 67,551.48
Step by Step Solution
- Step 1: Write the proportion equation
76,139.84 : 105,120.77 = 48,928.09 : x - Step 2: Convert to fraction form
76,139.84/105,120.77 = 48,928.09/x - Step 3: Cross multiply
76,139.84x = 105,120.77 × 48,928.09 - Step 4: Simplify right side
76,139.84x = 5,143,358,518.90 - Step 5: Solve for x
x = 5,143,358,518.90/76,139.84 - Step 6: Final answer
x = 67,551.48
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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.