Finding the Fourth Proportional to 115,721.99, 159,688.80 and 64,725.87
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Solution
The fourth proportional to 115,721.99, 159,688.80 and 64,725.87 is: 89,317.48
Step by Step Solution
- Step 1: Write the proportion equation
115,721.99 : 159,688.80 = 64,725.87 : x - Step 2: Convert to fraction form
115,721.99/159,688.80 = 64,725.87/x - Step 3: Cross multiply
115,721.99x = 159,688.80 × 64,725.87 - Step 4: Simplify right side
115,721.99x = 10,335,996,509.26 - Step 5: Solve for x
x = 10,335,996,509.26/115,721.99 - Step 6: Final answer
x = 89,317.48
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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.