Finding the Fourth Proportional to 128,656.28, 177,545.72 and 78,355.28
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Solution
The fourth proportional to 128,656.28, 177,545.72 and 78,355.28 is: 108,130.32
Step by Step Solution
- Step 1: Write the proportion equation
128,656.28 : 177,545.72 = 78,355.28 : x - Step 2: Convert to fraction form
128,656.28/177,545.72 = 78,355.28/x - Step 3: Cross multiply
128,656.28x = 177,545.72 × 78,355.28 - Step 4: Simplify right side
128,656.28x = 13,911,645,243.15 - Step 5: Solve for x
x = 13,911,645,243.15/128,656.28 - Step 6: Final answer
x = 108,130.32
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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.