Finding the Fourth Proportional to 158,603.11, 218,878.62 and 86,985.75
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Solution
The fourth proportional to 158,603.11, 218,878.62 and 86,985.75 is: 120,043.81
Step by Step Solution
- Step 1: Write the proportion equation
158,603.11 : 218,878.62 = 86,985.75 : x - Step 2: Convert to fraction form
158,603.11/218,878.62 = 86,985.75/x - Step 3: Cross multiply
158,603.11x = 218,878.62 × 86,985.75 - Step 4: Simplify right side
158,603.11x = 19,039,320,919.67 - Step 5: Solve for x
x = 19,039,320,919.67/158,603.11 - Step 6: Final answer
x = 120,043.81
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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.