Finding the Fourth Proportional to 141,639.21, 212,430.47 and 90,887.99
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Solution
The fourth proportional to 141,639.21, 212,430.47 and 90,887.99 is: 136,313.79
Step by Step Solution
- Step 1: Write the proportion equation
141,639.21 : 212,430.47 = 90,887.99 : x - Step 2: Convert to fraction form
141,639.21/212,430.47 = 90,887.99/x - Step 3: Cross multiply
141,639.21x = 212,430.47 × 90,887.99 - Step 4: Simplify right side
141,639.21x = 19,307,376,916.46 - Step 5: Solve for x
x = 19,307,376,916.46/141,639.21 - Step 6: Final answer
x = 136,313.79
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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.