Finding the Fourth Proportional to 81,358.49, 112,261.35 and 51,122.40
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Solution
The fourth proportional to 81,358.49, 112,261.35 and 51,122.40 is: 70,540.52
Step by Step Solution
- Step 1: Write the proportion equation
81,358.49 : 112,261.35 = 51,122.40 : x - Step 2: Convert to fraction form
81,358.49/112,261.35 = 51,122.40/x - Step 3: Cross multiply
81,358.49x = 112,261.35 × 51,122.40 - Step 4: Simplify right side
81,358.49x = 5,739,069,639.24 - Step 5: Solve for x
x = 5,739,069,639.24/81,358.49 - Step 6: Final answer
x = 70,540.52
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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.