Finding the Fourth Proportional to 420,703.56, 631,060.80 and 121,189.08
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Solution
The fourth proportional to 420,703.56, 631,060.80 and 121,189.08 is: 181,785.19
Step by Step Solution
- Step 1: Write the proportion equation
420,703.56 : 631,060.80 = 121,189.08 : x - Step 2: Convert to fraction form
420,703.56/631,060.80 = 121,189.08/x - Step 3: Cross multiply
420,703.56x = 631,060.80 × 121,189.08 - Step 4: Simplify right side
420,703.56x = 76,477,677,776.06 - Step 5: Solve for x
x = 76,477,677,776.06/420,703.56 - Step 6: Final answer
x = 181,785.19
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.