Finding the Fourth Proportional to 98,878.36, 136,444.62 and 56,431.12
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Solution
The fourth proportional to 98,878.36, 136,444.62 and 56,431.12 is: 77,870.66
Step by Step Solution
- Step 1: Write the proportion equation
98,878.36 : 136,444.62 = 56,431.12 : x - Step 2: Convert to fraction form
98,878.36/136,444.62 = 56,431.12/x - Step 3: Cross multiply
98,878.36x = 136,444.62 × 56,431.12 - Step 4: Simplify right side
98,878.36x = 7,699,722,724.57 - Step 5: Solve for x
x = 7,699,722,724.57/98,878.36 - Step 6: Final answer
x = 77,870.66
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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.