Finding the Fourth Proportional to 157,742.84, 217,693.98 and 86,129.53
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Solution
The fourth proportional to 157,742.84, 217,693.98 and 86,129.53 is: 118,863.58
Step by Step Solution
- Step 1: Write the proportion equation
157,742.84 : 217,693.98 = 86,129.53 : x - Step 2: Convert to fraction form
157,742.84/217,693.98 = 86,129.53/x - Step 3: Cross multiply
157,742.84x = 217,693.98 × 86,129.53 - Step 4: Simplify right side
157,742.84x = 18,749,879,636.99 - Step 5: Solve for x
x = 18,749,879,636.99/157,742.84 - Step 6: Final answer
x = 118,863.58
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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.