Finding the Fourth Proportional to 121,798.13, 168,069.60 and 76,461.62
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Solution
The fourth proportional to 121,798.13, 168,069.60 and 76,461.62 is: 105,509.61
Step by Step Solution
- Step 1: Write the proportion equation
121,798.13 : 168,069.60 = 76,461.62 : x - Step 2: Convert to fraction form
121,798.13/168,069.60 = 76,461.62/x - Step 3: Cross multiply
121,798.13x = 168,069.60 × 76,461.62 - Step 4: Simplify right side
121,798.13x = 12,850,873,048.40 - Step 5: Solve for x
x = 12,850,873,048.40/121,798.13 - Step 6: Final answer
x = 105,509.61
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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.