Finding the Fourth Proportional to 210,908.12, 316,395.18 and 68,720.38
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Solution
The fourth proportional to 210,908.12, 316,395.18 and 68,720.38 is: 103,091.32
Step by Step Solution
- Step 1: Write the proportion equation
210,908.12 : 316,395.18 = 68,720.38 : x - Step 2: Convert to fraction form
210,908.12/316,395.18 = 68,720.38/x - Step 3: Cross multiply
210,908.12x = 316,395.18 × 68,720.38 - Step 4: Simplify right side
210,908.12x = 21,742,796,999.77 - Step 5: Solve for x
x = 21,742,796,999.77/210,908.12 - Step 6: Final answer
x = 103,091.32
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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.