Finding the Fourth Proportional to 128,281.60, 192,616.80 and 98,732.80
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Solution
The fourth proportional to 128,281.60, 192,616.80 and 98,732.80 is: 148,248.82
Step by Step Solution
- Step 1: Write the proportion equation
128,281.60 : 192,616.80 = 98,732.80 : x - Step 2: Convert to fraction form
128,281.60/192,616.80 = 98,732.80/x - Step 3: Cross multiply
128,281.60x = 192,616.80 × 98,732.80 - Step 4: Simplify right side
128,281.60x = 19,017,595,991.04 - Step 5: Solve for x
x = 19,017,595,991.04/128,281.60 - Step 6: Final answer
x = 148,248.82
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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.