Finding the Fourth Proportional to 92,808.24, 128,074.68 and 72,685.68
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Solution
The fourth proportional to 92,808.24, 128,074.68 and 72,685.68 is: 100,305.70
Step by Step Solution
- Step 1: Write the proportion equation
92,808.24 : 128,074.68 = 72,685.68 : x - Step 2: Convert to fraction form
92,808.24/128,074.68 = 72,685.68/x - Step 3: Cross multiply
92,808.24x = 128,074.68 × 72,685.68 - Step 4: Simplify right side
92,808.24x = 9,309,195,206.58 - Step 5: Solve for x
x = 9,309,195,206.58/92,808.24 - Step 6: Final answer
x = 100,305.70
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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.