Finding the Fourth Proportional to 74,630.65, 102,988.81 and 40,639.54
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Solution
The fourth proportional to 74,630.65, 102,988.81 and 40,639.54 is: 56,081.75
Step by Step Solution
- Step 1: Write the proportion equation
74,630.65 : 102,988.81 = 40,639.54 : x - Step 2: Convert to fraction form
74,630.65/102,988.81 = 40,639.54/x - Step 3: Cross multiply
74,630.65x = 102,988.81 × 40,639.54 - Step 4: Simplify right side
74,630.65x = 4,185,417,504.48 - Step 5: Solve for x
x = 4,185,417,504.48/74,630.65 - Step 6: Final answer
x = 56,081.75
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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.