Finding the Fourth Proportional to 153,701.12, 212,107.14 and 85,718.18
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Solution
The fourth proportional to 153,701.12, 212,107.14 and 85,718.18 is: 118,290.86
Step by Step Solution
- Step 1: Write the proportion equation
153,701.12 : 212,107.14 = 85,718.18 : x - Step 2: Convert to fraction form
153,701.12/212,107.14 = 85,718.18/x - Step 3: Cross multiply
153,701.12x = 212,107.14 × 85,718.18 - Step 4: Simplify right side
153,701.12x = 18,181,438,005.81 - Step 5: Solve for x
x = 18,181,438,005.81/153,701.12 - Step 6: Final answer
x = 118,290.86
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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.