Finding the Fourth Proportional to 128,289.52, 177,024.27 and 70,921.09
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Solution
The fourth proportional to 128,289.52, 177,024.27 and 70,921.09 is: 97,862.66
Step by Step Solution
- Step 1: Write the proportion equation
128,289.52 : 177,024.27 = 70,921.09 : x - Step 2: Convert to fraction form
128,289.52/177,024.27 = 70,921.09/x - Step 3: Cross multiply
128,289.52x = 177,024.27 × 70,921.09 - Step 4: Simplify right side
128,289.52x = 12,554,754,184.85 - Step 5: Solve for x
x = 12,554,754,184.85/128,289.52 - Step 6: Final answer
x = 97,862.66
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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.