Finding the Fourth Proportional to 135,741.87, 187,260.78 and 84,721.59
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Solution
The fourth proportional to 135,741.87, 187,260.78 and 84,721.59 is: 116,876.47
Step by Step Solution
- Step 1: Write the proportion equation
135,741.87 : 187,260.78 = 84,721.59 : x - Step 2: Convert to fraction form
135,741.87/187,260.78 = 84,721.59/x - Step 3: Cross multiply
135,741.87x = 187,260.78 × 84,721.59 - Step 4: Simplify right side
135,741.87x = 15,865,031,026.24 - Step 5: Solve for x
x = 15,865,031,026.24/135,741.87 - Step 6: Final answer
x = 116,876.47
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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.