Finding the Fourth Proportional to 76,881.08, 115,317.51 and 20,720.28
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Solution
The fourth proportional to 76,881.08, 115,317.51 and 20,720.28 is: 31,079.31
Step by Step Solution
- Step 1: Write the proportion equation
76,881.08 : 115,317.51 = 20,720.28 : x - Step 2: Convert to fraction form
76,881.08/115,317.51 = 20,720.28/x - Step 3: Cross multiply
76,881.08x = 115,317.51 × 20,720.28 - Step 4: Simplify right side
76,881.08x = 2,389,411,096.10 - Step 5: Solve for x
x = 2,389,411,096.10/76,881.08 - Step 6: Final answer
x = 31,079.31
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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.