Finding the Fourth Proportional to 92,412.09, 137,949.62 and 81,202.05
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Solution
The fourth proportional to 92,412.09, 137,949.62 and 81,202.05 is: 121,215.65
Step by Step Solution
- Step 1: Write the proportion equation
92,412.09 : 137,949.62 = 81,202.05 : x - Step 2: Convert to fraction form
92,412.09/137,949.62 = 81,202.05/x - Step 3: Cross multiply
92,412.09x = 137,949.62 × 81,202.05 - Step 4: Simplify right side
92,412.09x = 11,201,791,534.71 - Step 5: Solve for x
x = 11,201,791,534.71/92,412.09 - Step 6: Final answer
x = 121,215.65
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.