Finding the Fourth Proportional to 91,141.80, 136,712.70 and 51,119.70
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Solution
The fourth proportional to 91,141.80, 136,712.70 and 51,119.70 is: 76,679.55
Step by Step Solution
- Step 1: Write the proportion equation
91,141.80 : 136,712.70 = 51,119.70 : x - Step 2: Convert to fraction form
91,141.80/136,712.70 = 51,119.70/x - Step 3: Cross multiply
91,141.80x = 136,712.70 × 51,119.70 - Step 4: Simplify right side
91,141.80x = 6,988,712,210.19 - Step 5: Solve for x
x = 6,988,712,210.19/91,141.80 - Step 6: Final answer
x = 76,679.55
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.