Finding the Fourth Proportional to 115,688.16, 159,645.60 and 65,386.08
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Solution
The fourth proportional to 115,688.16, 159,645.60 and 65,386.08 is: 90,230.50
Step by Step Solution
- Step 1: Write the proportion equation
115,688.16 : 159,645.60 = 65,386.08 : x - Step 2: Convert to fraction form
115,688.16/159,645.60 = 65,386.08/x - Step 3: Cross multiply
115,688.16x = 159,645.60 × 65,386.08 - Step 4: Simplify right side
115,688.16x = 10,438,599,973.25 - Step 5: Solve for x
x = 10,438,599,973.25/115,688.16 - Step 6: Final answer
x = 90,230.50
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1.5x scale
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.