Finding the Fourth Proportional to 133,143.18, 183,739.05 and 72,715.59
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Solution
The fourth proportional to 133,143.18, 183,739.05 and 72,715.59 is: 100,348.31
Step by Step Solution
- Step 1: Write the proportion equation
133,143.18 : 183,739.05 = 72,715.59 : x - Step 2: Convert to fraction form
133,143.18/183,739.05 = 72,715.59/x - Step 3: Cross multiply
133,143.18x = 183,739.05 × 72,715.59 - Step 4: Simplify right side
133,143.18x = 13,360,693,426.79 - Step 5: Solve for x
x = 13,360,693,426.79/133,143.18 - Step 6: Final answer
x = 100,348.31
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.