Finding the Fourth Proportional to 138,637.44, 191,319.48 and 78,208.02
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Solution
The fourth proportional to 138,637.44, 191,319.48 and 78,208.02 is: 107,926.96
Step by Step Solution
- Step 1: Write the proportion equation
138,637.44 : 191,319.48 = 78,208.02 : x - Step 2: Convert to fraction form
138,637.44/191,319.48 = 78,208.02/x - Step 3: Cross multiply
138,637.44x = 191,319.48 × 78,208.02 - Step 4: Simplify right side
138,637.44x = 14,962,717,718.23 - Step 5: Solve for x
x = 14,962,717,718.23/138,637.44 - Step 6: Final answer
x = 107,926.96
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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.