Finding the Fourth Proportional to 86,554.08, 129,831.12 and 20,890.08
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Solution
The fourth proportional to 86,554.08, 129,831.12 and 20,890.08 is: 31,335.12
Step by Step Solution
- Step 1: Write the proportion equation
86,554.08 : 129,831.12 = 20,890.08 : x - Step 2: Convert to fraction form
86,554.08/129,831.12 = 20,890.08/x - Step 3: Cross multiply
86,554.08x = 129,831.12 × 20,890.08 - Step 4: Simplify right side
86,554.08x = 2,712,182,483.29 - Step 5: Solve for x
x = 2,712,182,483.29/86,554.08 - Step 6: Final answer
x = 31,335.12
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.