Finding the Fourth Proportional to 153,019.08, 211,206.42 and 85,972.68
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Solution
The fourth proportional to 153,019.08, 211,206.42 and 85,972.68 is: 118,664.82
Step by Step Solution
- Step 1: Write the proportion equation
153,019.08 : 211,206.42 = 85,972.68 : x - Step 2: Convert to fraction form
153,019.08/211,206.42 = 85,972.68/x - Step 3: Cross multiply
153,019.08x = 211,206.42 × 85,972.68 - Step 4: Simplify right side
153,019.08x = 18,157,981,960.61 - Step 5: Solve for x
x = 18,157,981,960.61/153,019.08 - Step 6: Final answer
x = 118,664.82
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.