Finding the Fourth Proportional to 153,781.07, 212,305.07 and 100,039.19
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Solution
The fourth proportional to 153,781.07, 212,305.07 and 100,039.19 is: 138,110.80
Step by Step Solution
- Step 1: Write the proportion equation
153,781.07 : 212,305.07 = 100,039.19 : x - Step 2: Convert to fraction form
153,781.07/212,305.07 = 100,039.19/x - Step 3: Cross multiply
153,781.07x = 212,305.07 × 100,039.19 - Step 4: Simplify right side
153,781.07x = 21,238,827,235.69 - Step 5: Solve for x
x = 21,238,827,235.69/153,781.07 - Step 6: Final answer
x = 138,110.80
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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.