Finding the Fourth Proportional to 128,953.60, 193,430.40 and 102,515.20
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Solution
The fourth proportional to 128,953.60, 193,430.40 and 102,515.20 is: 153,772.80
Step by Step Solution
- Step 1: Write the proportion equation
128,953.60 : 193,430.40 = 102,515.20 : x - Step 2: Convert to fraction form
128,953.60/193,430.40 = 102,515.20/x - Step 3: Cross multiply
128,953.60x = 193,430.40 × 102,515.20 - Step 4: Simplify right side
128,953.60x = 19,829,556,142.08 - Step 5: Solve for x
x = 19,829,556,142.08/128,953.60 - Step 6: Final answer
x = 153,772.80
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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.