Finding the Fourth Proportional to 72,087.23, 107,980.16 and 57,971.09
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Solution
The fourth proportional to 72,087.23, 107,980.16 and 57,971.09 is: 86,835.45
Step by Step Solution
- Step 1: Write the proportion equation
72,087.23 : 107,980.16 = 57,971.09 : x - Step 2: Convert to fraction form
72,087.23/107,980.16 = 57,971.09/x - Step 3: Cross multiply
72,087.23x = 107,980.16 × 57,971.09 - Step 4: Simplify right side
72,087.23x = 6,259,727,553.67 - Step 5: Solve for x
x = 6,259,727,553.67/72,087.23 - Step 6: Final answer
x = 86,835.45
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1.5x scale
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.