Finding the Fourth Proportional to 138,781.68, 191,520.12 and 75,120.84
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Solution
The fourth proportional to 138,781.68, 191,520.12 and 75,120.84 is: 103,667.52
Step by Step Solution
- Step 1: Write the proportion equation
138,781.68 : 191,520.12 = 75,120.84 : x - Step 2: Convert to fraction form
138,781.68/191,520.12 = 75,120.84/x - Step 3: Cross multiply
138,781.68x = 191,520.12 × 75,120.84 - Step 4: Simplify right side
138,781.68x = 14,387,152,291.30 - Step 5: Solve for x
x = 14,387,152,291.30/138,781.68 - Step 6: Final answer
x = 103,667.52
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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.