Finding the Fourth Proportional to 135,501.69, 187,015.74 and 78,130.62
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Solution
The fourth proportional to 135,501.69, 187,015.74 and 78,130.62 is: 107,833.75
Step by Step Solution
- Step 1: Write the proportion equation
135,501.69 : 187,015.74 = 78,130.62 : x - Step 2: Convert to fraction form
135,501.69/187,015.74 = 78,130.62/x - Step 3: Cross multiply
135,501.69x = 187,015.74 × 78,130.62 - Step 4: Simplify right side
135,501.69x = 14,611,655,715.96 - Step 5: Solve for x
x = 14,611,655,715.96/135,501.69 - Step 6: Final answer
x = 107,833.75
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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.