Finding the Fourth Proportional to 138,910.37, 191,695.90 and 78,480.99
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Solution
The fourth proportional to 138,910.37, 191,695.90 and 78,480.99 is: 108,303.53
Step by Step Solution
- Step 1: Write the proportion equation
138,910.37 : 191,695.90 = 78,480.99 : x - Step 2: Convert to fraction form
138,910.37/191,695.90 = 78,480.99/x - Step 3: Cross multiply
138,910.37x = 191,695.90 × 78,480.99 - Step 4: Simplify right side
138,910.37x = 15,044,484,293.98 - Step 5: Solve for x
x = 15,044,484,293.98/138,910.37 - Step 6: Final answer
x = 108,303.53
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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.