Finding the Fourth Proportional to 139,335.99, 192,285.86 and 78,904.99
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Solution
The fourth proportional to 139,335.99, 192,285.86 and 78,904.99 is: 108,890.13
Step by Step Solution
- Step 1: Write the proportion equation
139,335.99 : 192,285.86 = 78,904.99 : x - Step 2: Convert to fraction form
139,335.99/192,285.86 = 78,904.99/x - Step 3: Cross multiply
139,335.99x = 192,285.86 × 78,904.99 - Step 4: Simplify right side
139,335.99x = 15,172,313,860.44 - Step 5: Solve for x
x = 15,172,313,860.44/139,335.99 - Step 6: Final answer
x = 108,890.13
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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.