Finding the Fourth Proportional to 118,206.99, 163,074.20 and 77,868.99
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Solution
The fourth proportional to 118,206.99, 163,074.20 and 77,868.99 is: 107,425.31
Step by Step Solution
- Step 1: Write the proportion equation
118,206.99 : 163,074.20 = 77,868.99 : x - Step 2: Convert to fraction form
118,206.99/163,074.20 = 77,868.99/x - Step 3: Cross multiply
118,206.99x = 163,074.20 × 77,868.99 - Step 4: Simplify right side
118,206.99x = 12,698,422,859.71 - Step 5: Solve for x
x = 12,698,422,859.71/118,206.99 - Step 6: Final answer
x = 107,425.31
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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.