Finding the Fourth Proportional to 128,368.54, 177,134.95 and 70,998.75
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Solution
The fourth proportional to 128,368.54, 177,134.95 and 70,998.75 is: 97,970.73
Step by Step Solution
- Step 1: Write the proportion equation
128,368.54 : 177,134.95 = 70,998.75 : x - Step 2: Convert to fraction form
128,368.54/177,134.95 = 70,998.75/x - Step 3: Cross multiply
128,368.54x = 177,134.95 × 70,998.75 - Step 4: Simplify right side
128,368.54x = 12,576,360,120.06 - Step 5: Solve for x
x = 12,576,360,120.06/128,368.54 - Step 6: Final answer
x = 97,970.73
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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.