Finding the Fourth Proportional to 128,429.84, 177,232.68 and 71,841.08
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Solution
The fourth proportional to 128,429.84, 177,232.68 and 71,841.08 is: 99,140.41
Step by Step Solution
- Step 1: Write the proportion equation
128,429.84 : 177,232.68 = 71,841.08 : x - Step 2: Convert to fraction form
128,429.84/177,232.68 = 71,841.08/x - Step 3: Cross multiply
128,429.84x = 177,232.68 × 71,841.08 - Step 4: Simplify right side
128,429.84x = 12,732,587,142.49 - Step 5: Solve for x
x = 12,732,587,142.49/128,429.84 - Step 6: Final answer
x = 99,140.41
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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.