Finding the Fourth Proportional to 76,913.70, 115,370.55 and 66,545.70
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Solution
The fourth proportional to 76,913.70, 115,370.55 and 66,545.70 is: 99,818.55
Step by Step Solution
- Step 1: Write the proportion equation
76,913.70 : 115,370.55 = 66,545.70 : x - Step 2: Convert to fraction form
76,913.70/115,370.55 = 66,545.70/x - Step 3: Cross multiply
76,913.70x = 115,370.55 × 66,545.70 - Step 4: Simplify right side
76,913.70x = 7,677,414,009.14 - Step 5: Solve for x
x = 7,677,414,009.14/76,913.70 - Step 6: Final answer
x = 99,818.55
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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.