Finding the Fourth Proportional to 138,708.05, 191,417.78 and 75,045.99
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Solution
The fourth proportional to 138,708.05, 191,417.78 and 75,045.99 is: 103,563.84
Step by Step Solution
- Step 1: Write the proportion equation
138,708.05 : 191,417.78 = 75,045.99 : x - Step 2: Convert to fraction form
138,708.05/191,417.78 = 75,045.99/x - Step 3: Cross multiply
138,708.05x = 191,417.78 × 75,045.99 - Step 4: Simplify right side
138,708.05x = 14,365,137,709.13 - Step 5: Solve for x
x = 14,365,137,709.13/138,708.05 - Step 6: Final answer
x = 103,563.84
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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.