Finding the Fourth Proportional to 210,004.68, 315,138.12 and 85,345.68
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Solution
The fourth proportional to 210,004.68, 315,138.12 and 85,345.68 is: 128,071.80
Step by Step Solution
- Step 1: Write the proportion equation
210,004.68 : 315,138.12 = 85,345.68 : x - Step 2: Convert to fraction form
210,004.68/315,138.12 = 85,345.68/x - Step 3: Cross multiply
210,004.68x = 315,138.12 × 85,345.68 - Step 4: Simplify right side
210,004.68x = 26,895,677,145.32 - Step 5: Solve for x
x = 26,895,677,145.32/210,004.68 - Step 6: Final answer
x = 128,071.80
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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.