Finding the Fourth Proportional to 81,312.03, 121,897.89 and 39,134.09
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Solution
The fourth proportional to 81,312.03, 121,897.89 and 39,134.09 is: 58,667.37
Step by Step Solution
- Step 1: Write the proportion equation
81,312.03 : 121,897.89 = 39,134.09 : x - Step 2: Convert to fraction form
81,312.03/121,897.89 = 39,134.09/x - Step 3: Cross multiply
81,312.03x = 121,897.89 × 39,134.09 - Step 4: Simplify right side
81,312.03x = 4,770,362,507.07 - Step 5: Solve for x
x = 4,770,362,507.07/81,312.03 - Step 6: Final answer
x = 58,667.37
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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.