Finding the Fourth Proportional to 76,801.20, 115,201.80 and 21,397.20
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Solution
The fourth proportional to 76,801.20, 115,201.80 and 21,397.20 is: 32,095.80
Step by Step Solution
- Step 1: Write the proportion equation
76,801.20 : 115,201.80 = 21,397.20 : x - Step 2: Convert to fraction form
76,801.20/115,201.80 = 21,397.20/x - Step 3: Cross multiply
76,801.20x = 115,201.80 × 21,397.20 - Step 4: Simplify right side
76,801.20x = 2,464,995,954.96 - Step 5: Solve for x
x = 2,464,995,954.96/76,801.20 - Step 6: Final answer
x = 32,095.80
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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.