Finding the Fourth Proportional to 86,596.10, 129,894.15 and 76,681.70
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Solution
The fourth proportional to 86,596.10, 129,894.15 and 76,681.70 is: 115,022.55
Step by Step Solution
- Step 1: Write the proportion equation
86,596.10 : 129,894.15 = 76,681.70 : x - Step 2: Convert to fraction form
86,596.10/129,894.15 = 76,681.70/x - Step 3: Cross multiply
86,596.10x = 129,894.15 × 76,681.70 - Step 4: Simplify right side
86,596.10x = 9,960,504,242.06 - Step 5: Solve for x
x = 9,960,504,242.06/86,596.10 - Step 6: Final answer
x = 115,022.55
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1.5x scale
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.