Finding the Fourth Proportional to 91,129.13, 136,726.51 and 31,974.02
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Solution
The fourth proportional to 91,129.13, 136,726.51 and 31,974.02 is: 47,972.54
Step by Step Solution
- Step 1: Write the proportion equation
91,129.13 : 136,726.51 = 31,974.02 : x - Step 2: Convert to fraction form
91,129.13/136,726.51 = 31,974.02/x - Step 3: Cross multiply
91,129.13x = 136,726.51 × 31,974.02 - Step 4: Simplify right side
91,129.13x = 4,371,696,165.27 - Step 5: Solve for x
x = 4,371,696,165.27/91,129.13 - Step 6: Final answer
x = 47,972.54
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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.