Finding the Fourth Proportional to 112,905.99, 155,913.39 and 72,688.14
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Solution
The fourth proportional to 112,905.99, 155,913.39 and 72,688.14 is: 100,376.02
Step by Step Solution
- Step 1: Write the proportion equation
112,905.99 : 155,913.39 = 72,688.14 : x - Step 2: Convert to fraction form
112,905.99/155,913.39 = 72,688.14/x - Step 3: Cross multiply
112,905.99x = 155,913.39 × 72,688.14 - Step 4: Simplify right side
112,905.99x = 11,333,054,320.19 - Step 5: Solve for x
x = 11,333,054,320.19/112,905.99 - Step 6: Final answer
x = 100,376.02
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1.5x scale
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.