Finding the Fourth Proportional to 138,656.25, 191,344.95 and 74,992.68
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Solution
The fourth proportional to 138,656.25, 191,344.95 and 74,992.68 is: 103,489.53
Step by Step Solution
- Step 1: Write the proportion equation
138,656.25 : 191,344.95 = 74,992.68 : x - Step 2: Convert to fraction form
138,656.25/191,344.95 = 74,992.68/x - Step 3: Cross multiply
138,656.25x = 191,344.95 × 74,992.68 - Step 4: Simplify right side
138,656.25x = 14,349,470,604.97 - Step 5: Solve for x
x = 14,349,470,604.97/138,656.25 - Step 6: Final answer
x = 103,489.53
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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.